TY  - JOUR
AU  - Bosnar, Sanja
AU  - Rac, Vladislav
AU  - Stošić, Dušan
AU  - Travert, Arnaud
AU  - Postole, Georgeta
AU  - Auroux, Aline
AU  - Škapin, Srečo
AU  - Damjanović-Vasilić, Ljiljana
AU  - Bronić, Josip
AU  - Du, Xuesen
AU  - Marković, Smilja
AU  - Pavlović, Vladimir
AU  - Rakić, Vesna
PY  - 2021
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5961
AB  - Dual templating approach, using hexadecyltrimethylammonium bromide (CTAB), was employed in an attempt to synthesize hierarchical ZSM-5 zeolite. Amount of mesoporogen and the duration of aging of the precursor were varied. Majority of the synthesis routes resulted in phase separation, yielding separate ZSM-5 and amorphous mesoporous material. The relative amounts of the two phases were dependent on the CTAB amount ratio and also significantly on the duration of precursor aging before CTAB addition. One particular combination of the two factors led to the formation of a homogeneous hierarchical form of ZSM-5 with leafy morphology, consisting of intergrown thin crystalline sheets which formed flower-like structures. The hierarchical ZSM-5 possessed significant microporous (≈95 m2/g) and highly developed mesoporous surface (≈470 m2/g), with a relatively broad distribution of mesopore sizes (<20 nm). The acidity of all samples was studied in detail. Isothermal microcalorimetry/volumetry of ammonia adsorption provided quantitative data on the number and distribution of strength of acidic sites. In situ FTIR of pyridine and collidine adsorption was used to quantify Brønsted and Lewis acid sites, and to provide information on their location - in the micropores or mesopores/external surface. The hierarchical ZSM-5 possessed both Lewis and Brønsted acidity, with Brønsted sites located mainly in the micropores. All samples were fully characterized using XRD, low temperature nitrogen adsorption, FESEM and EDS. The synthetic route used for obtaining the ZSM-5 zeolite with flower-like morphology is a simple strategy for preparing hierarchical ZSM-5 forms targeting enhanced diffusivity and accessibility of catalytically active sites.
PB  - Elsevier B.V.
T2  - Microporous and Mesoporous Materials
T1  - Overcoming phase separation in dual templating: A homogeneous hierarchical ZSM-5 zeolite with flower-like morphology, synthesis and in-depth acidity study
SP  - 111534
VL  - 329
DO  - 10.1016/j.micromeso.2021.111534
ER  - 

@article{
author = "Bosnar, Sanja and Rac, Vladislav and Stošić, Dušan and Travert, Arnaud and Postole, Georgeta and Auroux, Aline and Škapin, Srečo and Damjanović-Vasilić, Ljiljana and Bronić, Josip and Du, Xuesen and Marković, Smilja and Pavlović, Vladimir and Rakić, Vesna",
year = "2021",
abstract = "Dual templating approach, using hexadecyltrimethylammonium bromide (CTAB), was employed in an attempt to synthesize hierarchical ZSM-5 zeolite. Amount of mesoporogen and the duration of aging of the precursor were varied. Majority of the synthesis routes resulted in phase separation, yielding separate ZSM-5 and amorphous mesoporous material. The relative amounts of the two phases were dependent on the CTAB amount ratio and also significantly on the duration of precursor aging before CTAB addition. One particular combination of the two factors led to the formation of a homogeneous hierarchical form of ZSM-5 with leafy morphology, consisting of intergrown thin crystalline sheets which formed flower-like structures. The hierarchical ZSM-5 possessed significant microporous (≈95 m2/g) and highly developed mesoporous surface (≈470 m2/g), with a relatively broad distribution of mesopore sizes (<20 nm). The acidity of all samples was studied in detail. Isothermal microcalorimetry/volumetry of ammonia adsorption provided quantitative data on the number and distribution of strength of acidic sites. In situ FTIR of pyridine and collidine adsorption was used to quantify Brønsted and Lewis acid sites, and to provide information on their location - in the micropores or mesopores/external surface. The hierarchical ZSM-5 possessed both Lewis and Brønsted acidity, with Brønsted sites located mainly in the micropores. All samples were fully characterized using XRD, low temperature nitrogen adsorption, FESEM and EDS. The synthetic route used for obtaining the ZSM-5 zeolite with flower-like morphology is a simple strategy for preparing hierarchical ZSM-5 forms targeting enhanced diffusivity and accessibility of catalytically active sites.",
publisher = "Elsevier B.V.",
journal = "Microporous and Mesoporous Materials",
title = "Overcoming phase separation in dual templating: A homogeneous hierarchical ZSM-5 zeolite with flower-like morphology, synthesis and in-depth acidity study",
pages = "111534",
volume = "329",
doi = "10.1016/j.micromeso.2021.111534"
}

Bosnar, S., Rac, V., Stošić, D., Travert, A., Postole, G., Auroux, A., Škapin, S., Damjanović-Vasilić, L., Bronić, J., Du, X., Marković, S., Pavlović, V.,& Rakić, V.. (2021). Overcoming phase separation in dual templating: A homogeneous hierarchical ZSM-5 zeolite with flower-like morphology, synthesis and in-depth acidity study. in Microporous and Mesoporous Materials
Elsevier B.V.., 329, 111534.
https://doi.org/10.1016/j.micromeso.2021.111534

Bosnar S, Rac V, Stošić D, Travert A, Postole G, Auroux A, Škapin S, Damjanović-Vasilić L, Bronić J, Du X, Marković S, Pavlović V, Rakić V. Overcoming phase separation in dual templating: A homogeneous hierarchical ZSM-5 zeolite with flower-like morphology, synthesis and in-depth acidity study. in Microporous and Mesoporous Materials. 2021;329:111534.
doi:10.1016/j.micromeso.2021.111534 .

Bosnar, Sanja, Rac, Vladislav, Stošić, Dušan, Travert, Arnaud, Postole, Georgeta, Auroux, Aline, Škapin, Srečo, Damjanović-Vasilić, Ljiljana, Bronić, Josip, Du, Xuesen, Marković, Smilja, Pavlović, Vladimir, Rakić, Vesna, "Overcoming phase separation in dual templating: A homogeneous hierarchical ZSM-5 zeolite with flower-like morphology, synthesis and in-depth acidity study" in Microporous and Mesoporous Materials, 329 (2021):111534,
https://doi.org/10.1016/j.micromeso.2021.111534 . .

TY  - JOUR
AU  - Rac, Vladislav
AU  - Rakić, Vesna
AU  - Stošić, Dušan
AU  - Pavlović, Vladimir
AU  - Bosnar, Sanja
AU  - Auroux, Aline
PY  - 2020
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5365
AB  - The possibility of removal of pharmaceutically active substances, atenolol, diclofenac sodium and salicylic acid, from water solutions using hierarchical form of zeolite ZSM-5 is investigated in this paper. Mesopore formation in ZSM-5 was achieved using alkaline treatment. Zeolitic samples were characterized by X-ray diffraction, low temperature nitrogen adsorption, solid-state 27A1 MAS NMR, point of zero charge determination and microcalorimetry - volumetry of ammonia adsorption. Adsorption isotherms of pharmaceutically active substances were obtained and liquid calorimetric experiments were used to evaluate the strength of interactions. The capacity for salicylic acid adsorption measured for the mesoporous sample did not significantly differ from the results obtained for the parent ZSM-5. However, in the case of atenolol and diclofenac sodium, mesoporous ZSM-5 exhibited increased adsorption capacities. Calorimetric data revealed higher heats of atenolol adsorption on mesoporous ZSM-5, compared to the parent. Based on similar acidity and surface charge determined for the two samples, our results show that geometry and dimensions of both zeolite pores and adsorbing molecules play a crucial role in the studied adsorption processes and that tailoring ZSM-5 porosity by desilication can be used to expand its applicability in depollution processes.
PB  - Elsevier, Amsterdam
T2  - Arabian Journal of Chemistry
T1  - Enhanced accessibility of active sites in hierarchical ZSM-5 zeolite for removal of pharmaceutically active substances: Adsorption and microcalorimetric study
EP  - 1954
IS  - 1
SP  - 1945
VL  - 13
DO  - 10.1016/j.arabjc.2018.02.012
ER  - 

@article{
author = "Rac, Vladislav and Rakić, Vesna and Stošić, Dušan and Pavlović, Vladimir and Bosnar, Sanja and Auroux, Aline",
year = "2020",
abstract = "The possibility of removal of pharmaceutically active substances, atenolol, diclofenac sodium and salicylic acid, from water solutions using hierarchical form of zeolite ZSM-5 is investigated in this paper. Mesopore formation in ZSM-5 was achieved using alkaline treatment. Zeolitic samples were characterized by X-ray diffraction, low temperature nitrogen adsorption, solid-state 27A1 MAS NMR, point of zero charge determination and microcalorimetry - volumetry of ammonia adsorption. Adsorption isotherms of pharmaceutically active substances were obtained and liquid calorimetric experiments were used to evaluate the strength of interactions. The capacity for salicylic acid adsorption measured for the mesoporous sample did not significantly differ from the results obtained for the parent ZSM-5. However, in the case of atenolol and diclofenac sodium, mesoporous ZSM-5 exhibited increased adsorption capacities. Calorimetric data revealed higher heats of atenolol adsorption on mesoporous ZSM-5, compared to the parent. Based on similar acidity and surface charge determined for the two samples, our results show that geometry and dimensions of both zeolite pores and adsorbing molecules play a crucial role in the studied adsorption processes and that tailoring ZSM-5 porosity by desilication can be used to expand its applicability in depollution processes.",
publisher = "Elsevier, Amsterdam",
journal = "Arabian Journal of Chemistry",
title = "Enhanced accessibility of active sites in hierarchical ZSM-5 zeolite for removal of pharmaceutically active substances: Adsorption and microcalorimetric study",
pages = "1954-1945",
number = "1",
volume = "13",
doi = "10.1016/j.arabjc.2018.02.012"
}

Rac, V., Rakić, V., Stošić, D., Pavlović, V., Bosnar, S.,& Auroux, A.. (2020). Enhanced accessibility of active sites in hierarchical ZSM-5 zeolite for removal of pharmaceutically active substances: Adsorption and microcalorimetric study. in Arabian Journal of Chemistry
Elsevier, Amsterdam., 13(1), 1945-1954.
https://doi.org/10.1016/j.arabjc.2018.02.012

Rac V, Rakić V, Stošić D, Pavlović V, Bosnar S, Auroux A. Enhanced accessibility of active sites in hierarchical ZSM-5 zeolite for removal of pharmaceutically active substances: Adsorption and microcalorimetric study. in Arabian Journal of Chemistry. 2020;13(1):1945-1954.
doi:10.1016/j.arabjc.2018.02.012 .

Rac, Vladislav, Rakić, Vesna, Stošić, Dušan, Pavlović, Vladimir, Bosnar, Sanja, Auroux, Aline, "Enhanced accessibility of active sites in hierarchical ZSM-5 zeolite for removal of pharmaceutically active substances: Adsorption and microcalorimetric study" in Arabian Journal of Chemistry, 13, no. 1 (2020):1945-1954,
https://doi.org/10.1016/j.arabjc.2018.02.012 . .

TY  - JOUR
AU  - Obradović, Nina
AU  - Filipović, Suzana
AU  - Rusmirović, Jelena D.
AU  - Postole, Georgeta
AU  - Marinković, Aleksandar
AU  - Radić, Danka
AU  - Rakić, Vesna
AU  - Pavlović, Vladimir
AU  - Auroux, Aline
PY  - 2017
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4477
AB  - In this paper, synthesis of porous wollastonite-based ceramics was reported. Ceramic precursor, methylhydrocyclosiloxane, together with micro-sized CaCO3, was used as starting material. After 20 min of ultrasound treatment, and calcination at 250 degrees C for 30 min, yeast as a pore-forming agent was added to the as-obtained powders. Sintering regime was set up based on the results obtained by differential thermal analysis. Prepared mixture was pressed into pallets and sintered at 900 degrees C for 1 h. After the sintering regime, porous wollastonite-based ceramics was obtained. The phase composition of the sintered samples as well as microstructures was analyzed by X-ray diffraction method and SEM. In a batch test, the influence of pH, contact time and initial ion concentration on adsorption efficiency of As+5, Cr+6, and phosphate ions on synthesized wollastonite-based ceramics were studied. Time-dependent adsorption was best described by pseudo-second-order kinetic model and Weber-Morris model that predicted intra-particle diffusion as a rate-controlling step of overall process. High adsorption capacities 39.97, 21.87, and 15.29 mgg(-1) were obtained for As+5, Cr+6, and phosphate ions, respectively.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Formation of Porous Wollastonite-based Ceramics after Sintering With Yeast as the Pore-forming Agent
EP  - 246
IS  - 3
SP  - 235
VL  - 49
DO  - 10.2298/SOS1703235O
ER  - 

@article{
author = "Obradović, Nina and Filipović, Suzana and Rusmirović, Jelena D. and Postole, Georgeta and Marinković, Aleksandar and Radić, Danka and Rakić, Vesna and Pavlović, Vladimir and Auroux, Aline",
year = "2017",
abstract = "In this paper, synthesis of porous wollastonite-based ceramics was reported. Ceramic precursor, methylhydrocyclosiloxane, together with micro-sized CaCO3, was used as starting material. After 20 min of ultrasound treatment, and calcination at 250 degrees C for 30 min, yeast as a pore-forming agent was added to the as-obtained powders. Sintering regime was set up based on the results obtained by differential thermal analysis. Prepared mixture was pressed into pallets and sintered at 900 degrees C for 1 h. After the sintering regime, porous wollastonite-based ceramics was obtained. The phase composition of the sintered samples as well as microstructures was analyzed by X-ray diffraction method and SEM. In a batch test, the influence of pH, contact time and initial ion concentration on adsorption efficiency of As+5, Cr+6, and phosphate ions on synthesized wollastonite-based ceramics were studied. Time-dependent adsorption was best described by pseudo-second-order kinetic model and Weber-Morris model that predicted intra-particle diffusion as a rate-controlling step of overall process. High adsorption capacities 39.97, 21.87, and 15.29 mgg(-1) were obtained for As+5, Cr+6, and phosphate ions, respectively.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Formation of Porous Wollastonite-based Ceramics after Sintering With Yeast as the Pore-forming Agent",
pages = "246-235",
number = "3",
volume = "49",
doi = "10.2298/SOS1703235O"
}

Obradović, N., Filipović, S., Rusmirović, J. D., Postole, G., Marinković, A., Radić, D., Rakić, V., Pavlović, V.,& Auroux, A.. (2017). Formation of Porous Wollastonite-based Ceramics after Sintering With Yeast as the Pore-forming Agent. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 49(3), 235-246.
https://doi.org/10.2298/SOS1703235O

Obradović N, Filipović S, Rusmirović JD, Postole G, Marinković A, Radić D, Rakić V, Pavlović V, Auroux A. Formation of Porous Wollastonite-based Ceramics after Sintering With Yeast as the Pore-forming Agent. in Science of Sintering. 2017;49(3):235-246.
doi:10.2298/SOS1703235O .

Obradović, Nina, Filipović, Suzana, Rusmirović, Jelena D., Postole, Georgeta, Marinković, Aleksandar, Radić, Danka, Rakić, Vesna, Pavlović, Vladimir, Auroux, Aline, "Formation of Porous Wollastonite-based Ceramics after Sintering With Yeast as the Pore-forming Agent" in Science of Sintering, 49, no. 3 (2017):235-246,
https://doi.org/10.2298/SOS1703235O . .

TY  - JOUR
AU  - Rac, Vladislav
AU  - Rakić, Vesna
AU  - Damjanović-Vasilić, Ljiljana
AU  - Dondur, Vera
AU  - Auroux, Aline
PY  - 2017
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4487
AB  - Room temperature adsorption of CO and N2O using isothermal calorimetry and in situ FTIR spectroscopy on bimetallic and monometallic forms of Cu, Fe and Mn exchanged zeolite ZSM-5 was studied. The two complementary techniques allowed the assessment of the strengths of interactions as well as the identification of the cations active in adsorption. In bimetallic samples containing Cu, a synergistic effect was observed for CO adsorption, i.e higher strengths of adsorption were detected than for corresponding monometallic samples. Such an effect was not detected for N2O. Furthermore, FTIR measurements revealed that N2O adsorption was somewhat restricted for the cation which was introduced the first in bimetallic samples. These findings imply the importance of the order of cation introduction and the procedure of ion exchange process for the adsorptive properties of bimetallic ZSM-5 and, consequently, catalytic reactions where adsorption of N2O is an important reaction step.
PB  - Elsevier, Amsterdam
T2  - Applied Surface Science
T1  - Complementary approach to the adsorption of CO and N2O on bimetallic ion exchanged ZMS-5 zeolite: Microcalorimetric and FTIR spectroscopy study
EP  - 1140
SP  - 1134
VL  - 423
DO  - 10.1016/j.apsusc.2017.06.269
ER  - 

@article{
author = "Rac, Vladislav and Rakić, Vesna and Damjanović-Vasilić, Ljiljana and Dondur, Vera and Auroux, Aline",
year = "2017",
abstract = "Room temperature adsorption of CO and N2O using isothermal calorimetry and in situ FTIR spectroscopy on bimetallic and monometallic forms of Cu, Fe and Mn exchanged zeolite ZSM-5 was studied. The two complementary techniques allowed the assessment of the strengths of interactions as well as the identification of the cations active in adsorption. In bimetallic samples containing Cu, a synergistic effect was observed for CO adsorption, i.e higher strengths of adsorption were detected than for corresponding monometallic samples. Such an effect was not detected for N2O. Furthermore, FTIR measurements revealed that N2O adsorption was somewhat restricted for the cation which was introduced the first in bimetallic samples. These findings imply the importance of the order of cation introduction and the procedure of ion exchange process for the adsorptive properties of bimetallic ZSM-5 and, consequently, catalytic reactions where adsorption of N2O is an important reaction step.",
publisher = "Elsevier, Amsterdam",
journal = "Applied Surface Science",
title = "Complementary approach to the adsorption of CO and N2O on bimetallic ion exchanged ZMS-5 zeolite: Microcalorimetric and FTIR spectroscopy study",
pages = "1140-1134",
volume = "423",
doi = "10.1016/j.apsusc.2017.06.269"
}

Rac, V., Rakić, V., Damjanović-Vasilić, L., Dondur, V.,& Auroux, A.. (2017). Complementary approach to the adsorption of CO and N2O on bimetallic ion exchanged ZMS-5 zeolite: Microcalorimetric and FTIR spectroscopy study. in Applied Surface Science
Elsevier, Amsterdam., 423, 1134-1140.
https://doi.org/10.1016/j.apsusc.2017.06.269

Rac V, Rakić V, Damjanović-Vasilić L, Dondur V, Auroux A. Complementary approach to the adsorption of CO and N2O on bimetallic ion exchanged ZMS-5 zeolite: Microcalorimetric and FTIR spectroscopy study. in Applied Surface Science. 2017;423:1134-1140.
doi:10.1016/j.apsusc.2017.06.269 .

Rac, Vladislav, Rakić, Vesna, Damjanović-Vasilić, Ljiljana, Dondur, Vera, Auroux, Aline, "Complementary approach to the adsorption of CO and N2O on bimetallic ion exchanged ZMS-5 zeolite: Microcalorimetric and FTIR spectroscopy study" in Applied Surface Science, 423 (2017):1134-1140,
https://doi.org/10.1016/j.apsusc.2017.06.269 . .

TY  - JOUR
AU  - Rakić, Vesna
AU  - Rac, Vladislav
AU  - Krmar, Marija
AU  - Otman, Otman
AU  - Auroux, Aline
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3803
AB  - In this study, the adsorption of pharmaceutically active compounds - salicylic acid, acetylsalicylic acid, atenolol and diclofenac-Na onto activated carbons has been studied. Three different commercial activated carbons, possessing similar to 650, 900 or 1500 m(2) g(-1) surface areas were used as solid adsorbents. These materials were fully characterized - their textural, surface features and points of zero charge have been determined. The adsorption was studied from aqueous solutions at 303 K using batch adsorption experiments and titration microcalorimetry, which was employed in order to obtain the heats evolved as a result of adsorption. The maximal adsorption capacities of investigated solids for all target pharmaceuticals are in the range of 10(-4) mol g(-1). The obtained maximal retention capacities are correlated with the textural properties of applied activated carbon. The roles of acid/base features of activated carbons and of molecular structures of adsorbate molecules have been discussed. The obtained results enabled to estimate the possibility to use the activated carbons in the removal of pharmaceuticals by adsorption.
PB  - Elsevier Science Bv, Amsterdam
T2  - Journal of Hazardous Materials
T1  - The adsorption of pharmaceutically active compounds from aqueous solutions onto activated carbons
EP  - 149
SP  - 141
VL  - 282
DO  - 10.1016/j.jhazmat.2014.04.062
ER  - 

@article{
author = "Rakić, Vesna and Rac, Vladislav and Krmar, Marija and Otman, Otman and Auroux, Aline",
year = "2015",
abstract = "In this study, the adsorption of pharmaceutically active compounds - salicylic acid, acetylsalicylic acid, atenolol and diclofenac-Na onto activated carbons has been studied. Three different commercial activated carbons, possessing similar to 650, 900 or 1500 m(2) g(-1) surface areas were used as solid adsorbents. These materials were fully characterized - their textural, surface features and points of zero charge have been determined. The adsorption was studied from aqueous solutions at 303 K using batch adsorption experiments and titration microcalorimetry, which was employed in order to obtain the heats evolved as a result of adsorption. The maximal adsorption capacities of investigated solids for all target pharmaceuticals are in the range of 10(-4) mol g(-1). The obtained maximal retention capacities are correlated with the textural properties of applied activated carbon. The roles of acid/base features of activated carbons and of molecular structures of adsorbate molecules have been discussed. The obtained results enabled to estimate the possibility to use the activated carbons in the removal of pharmaceuticals by adsorption.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Journal of Hazardous Materials",
title = "The adsorption of pharmaceutically active compounds from aqueous solutions onto activated carbons",
pages = "149-141",
volume = "282",
doi = "10.1016/j.jhazmat.2014.04.062"
}

Rakić, V., Rac, V., Krmar, M., Otman, O.,& Auroux, A.. (2015). The adsorption of pharmaceutically active compounds from aqueous solutions onto activated carbons. in Journal of Hazardous Materials
Elsevier Science Bv, Amsterdam., 282, 141-149.
https://doi.org/10.1016/j.jhazmat.2014.04.062

Rakić V, Rac V, Krmar M, Otman O, Auroux A. The adsorption of pharmaceutically active compounds from aqueous solutions onto activated carbons. in Journal of Hazardous Materials. 2015;282:141-149.
doi:10.1016/j.jhazmat.2014.04.062 .

Rakić, Vesna, Rac, Vladislav, Krmar, Marija, Otman, Otman, Auroux, Aline, "The adsorption of pharmaceutically active compounds from aqueous solutions onto activated carbons" in Journal of Hazardous Materials, 282 (2015):141-149,
https://doi.org/10.1016/j.jhazmat.2014.04.062 . .

TY  - JOUR
AU  - Hercigonja, Radmila
AU  - Rac, Vladislav
AU  - Rakić, Vesna
AU  - Auroux, Aline
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3743
AB  - Besides its importance concerning fundamental studies on gas adsorption in narrow pores, investigation of the commensurate freezing of a fluid within a zeolite is of practical importance in the application of zeolites in the processes of adsorption, separation and catalysis. In this work, the adsorption of n-hexane on HZSM-5 and its transition metal ion-exchanged modified forms was studied at 303 K by means of microcalorimetry. The thermal molar entropies changes of adsorption were calculated and thereby, the freezing-like behaviour of n-hexane inside the structure of the zeolite as a confinement media was noticed. This effect is governed by the attractive interactions between n-hexane molecules and the pore walls, and is influenced by the length of the pores and the nature of the charge-balancing cations. Among the investigated zeolites, a solid-like phase of n-hexane in the pores of zeolites with Fe(II) ions was the most similar to solid bulk n-hexane, while Cu(II) ions contributed to the lowest ordering of the obtained solid-like n-hexane phase.
PB  - Srpsko hemijsko društvo, Beograd
T2  - JOURNAL OF THE SERBIAN CHEMICAL SOCIETY
T1  - Effect of transition metal cations on the commensurate freezing of n-hexane confined in micropores of ZSM-5
EP  - 1309
IS  - 10
SP  - 1297
VL  - 80
DO  - 10.2298/JSC150203032H
ER  - 

@article{
author = "Hercigonja, Radmila and Rac, Vladislav and Rakić, Vesna and Auroux, Aline",
year = "2015",
abstract = "Besides its importance concerning fundamental studies on gas adsorption in narrow pores, investigation of the commensurate freezing of a fluid within a zeolite is of practical importance in the application of zeolites in the processes of adsorption, separation and catalysis. In this work, the adsorption of n-hexane on HZSM-5 and its transition metal ion-exchanged modified forms was studied at 303 K by means of microcalorimetry. The thermal molar entropies changes of adsorption were calculated and thereby, the freezing-like behaviour of n-hexane inside the structure of the zeolite as a confinement media was noticed. This effect is governed by the attractive interactions between n-hexane molecules and the pore walls, and is influenced by the length of the pores and the nature of the charge-balancing cations. Among the investigated zeolites, a solid-like phase of n-hexane in the pores of zeolites with Fe(II) ions was the most similar to solid bulk n-hexane, while Cu(II) ions contributed to the lowest ordering of the obtained solid-like n-hexane phase.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "JOURNAL OF THE SERBIAN CHEMICAL SOCIETY",
title = "Effect of transition metal cations on the commensurate freezing of n-hexane confined in micropores of ZSM-5",
pages = "1309-1297",
number = "10",
volume = "80",
doi = "10.2298/JSC150203032H"
}

Hercigonja, R., Rac, V., Rakić, V.,& Auroux, A.. (2015). Effect of transition metal cations on the commensurate freezing of n-hexane confined in micropores of ZSM-5. in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY
Srpsko hemijsko društvo, Beograd., 80(10), 1297-1309.
https://doi.org/10.2298/JSC150203032H

Hercigonja R, Rac V, Rakić V, Auroux A. Effect of transition metal cations on the commensurate freezing of n-hexane confined in micropores of ZSM-5. in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY. 2015;80(10):1297-1309.
doi:10.2298/JSC150203032H .

Hercigonja, Radmila, Rac, Vladislav, Rakić, Vesna, Auroux, Aline, "Effect of transition metal cations on the commensurate freezing of n-hexane confined in micropores of ZSM-5" in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY, 80, no. 10 (2015):1297-1309,
https://doi.org/10.2298/JSC150203032H . .

TY  - JOUR
AU  - Rac, Vladislav
AU  - Rakić, Vesna
AU  - Stošić, Dušan
AU  - Otman, Otman
AU  - Auroux, Aline
PY  - 2014
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3414
AB  - The acidity of hierarchical USY, Beta and ZSM-5 zeolites obtained by alkaline treatment was investigated. Samples were characterized by low temperature nitrogen adsorption, X ray diffraction and solid-state (27)AI MAS NMR. Acidity of parent and mesoporous samples was estimated through the adsorption of typical probe molecules - measurements were conducted in both gas phase (microcalorimetry/volumetry of ammonia adsorption, FTIR spectrometry of pyridine adsorption/desorption) and aqueous phase (calorimetry of phenylethylamine adsorption). Quantitative distributions in strength of the acid sites were determined, as well as acid sites concentrations. No significant changes in total acidity were detected for ZSM-5. Acid sites strength was decreased in modified Beta and USY zeolites. The samples were probed as catalysts for the dehydration of fructose. Higher selectivities towards 5-hydroxymethylfurfural were detected for all modified zeolites, compared to the parent ones.
PB  - Elsevier Science Bv, Amsterdam
T2  - Microporous and Mesoporous Materials
T1  - Hierarchical ZSM-5, Beta and USY zeolites: Acidity assessment by gas and aqueous phase calorimetry and catalytic activity in fructose dehydration reaction
EP  - 134
SP  - 126
VL  - 194
DO  - 10.1016/j.micromeso.2014.04.003
ER  - 

@article{
author = "Rac, Vladislav and Rakić, Vesna and Stošić, Dušan and Otman, Otman and Auroux, Aline",
year = "2014",
abstract = "The acidity of hierarchical USY, Beta and ZSM-5 zeolites obtained by alkaline treatment was investigated. Samples were characterized by low temperature nitrogen adsorption, X ray diffraction and solid-state (27)AI MAS NMR. Acidity of parent and mesoporous samples was estimated through the adsorption of typical probe molecules - measurements were conducted in both gas phase (microcalorimetry/volumetry of ammonia adsorption, FTIR spectrometry of pyridine adsorption/desorption) and aqueous phase (calorimetry of phenylethylamine adsorption). Quantitative distributions in strength of the acid sites were determined, as well as acid sites concentrations. No significant changes in total acidity were detected for ZSM-5. Acid sites strength was decreased in modified Beta and USY zeolites. The samples were probed as catalysts for the dehydration of fructose. Higher selectivities towards 5-hydroxymethylfurfural were detected for all modified zeolites, compared to the parent ones.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Microporous and Mesoporous Materials",
title = "Hierarchical ZSM-5, Beta and USY zeolites: Acidity assessment by gas and aqueous phase calorimetry and catalytic activity in fructose dehydration reaction",
pages = "134-126",
volume = "194",
doi = "10.1016/j.micromeso.2014.04.003"
}

Rac, V., Rakić, V., Stošić, D., Otman, O.,& Auroux, A.. (2014). Hierarchical ZSM-5, Beta and USY zeolites: Acidity assessment by gas and aqueous phase calorimetry and catalytic activity in fructose dehydration reaction. in Microporous and Mesoporous Materials
Elsevier Science Bv, Amsterdam., 194, 126-134.
https://doi.org/10.1016/j.micromeso.2014.04.003

Rac V, Rakić V, Stošić D, Otman O, Auroux A. Hierarchical ZSM-5, Beta and USY zeolites: Acidity assessment by gas and aqueous phase calorimetry and catalytic activity in fructose dehydration reaction. in Microporous and Mesoporous Materials. 2014;194:126-134.
doi:10.1016/j.micromeso.2014.04.003 .

Rac, Vladislav, Rakić, Vesna, Stošić, Dušan, Otman, Otman, Auroux, Aline, "Hierarchical ZSM-5, Beta and USY zeolites: Acidity assessment by gas and aqueous phase calorimetry and catalytic activity in fructose dehydration reaction" in Microporous and Mesoporous Materials, 194 (2014):126-134,
https://doi.org/10.1016/j.micromeso.2014.04.003 . .

TY  - JOUR
AU  - Stošić, Dušan
AU  - Bennici, Simona
AU  - Pavlović, Vladimir
AU  - Rakić, Vesna
AU  - Auroux, Aline
PY  - 2014
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3409
AB  - Mesoporous Nb2O5 MeO2 (Me = Ti, Zr, Ce) mixed oxides were successfully prepared using evaporation-induced self-assembly (EISA) method. The structural and textural properties of these materials have been fully characterized using appropriate techniques (low-temperature adsorption-desorption of nitrogen, thermogravimetric analysis, X-ray diffraction analysis (XRD) transmission electron microscopy (TEM), scanning electron microscopy (SEM) and Raman spectroscopy). Acid-base properties were estimated by adsorption microcalorimetry of NH3 and SO2 molecules in order to determine the population, strength and strength distribution of acidic or basic sites. Formation of mesoporous structure was confirmed by the results of XRD, TEM and BET techniques. Results of adsorption microcalorimetry technique showed that the type of transition metal oxide added to niobia has a decisive role for acidic-basic character of investigated mixed oxides. Among the investigated mixed oxide formulations only Nb2O5-CeO2 was amphoteric, while the other samples showed prominent acidic character. All the investigated materials are catalytically active in fructose dehydration; conversion of fructose and selectivity to 5-hydroxymethylfurfural (5-HMF) and levulinic acid (LA) are proved to be dependant on the number of acidic sites on the surface of catalysts. Furthermore, presence of the basic sites on the surface of the catalyst decreases the activity in the fructose dehydration reaction, as in the case of Nb2O5-CeO2 sample.
PB  - Elsevier Science Sa, Lausanne
T2  - Materials Chemistry and Physics
T1  - Tuning the acidity of niobia: Characterization and catalytic activity of Nb2O5-MeO2 (Me = Ti, Zr, Ce) mesoporous mixed oxides
EP  - 345
IS  - 3
SP  - 337
VL  - 146
DO  - 10.1016/j.matchemphys.2014.03.033
ER  - 

@article{
author = "Stošić, Dušan and Bennici, Simona and Pavlović, Vladimir and Rakić, Vesna and Auroux, Aline",
year = "2014",
abstract = "Mesoporous Nb2O5 MeO2 (Me = Ti, Zr, Ce) mixed oxides were successfully prepared using evaporation-induced self-assembly (EISA) method. The structural and textural properties of these materials have been fully characterized using appropriate techniques (low-temperature adsorption-desorption of nitrogen, thermogravimetric analysis, X-ray diffraction analysis (XRD) transmission electron microscopy (TEM), scanning electron microscopy (SEM) and Raman spectroscopy). Acid-base properties were estimated by adsorption microcalorimetry of NH3 and SO2 molecules in order to determine the population, strength and strength distribution of acidic or basic sites. Formation of mesoporous structure was confirmed by the results of XRD, TEM and BET techniques. Results of adsorption microcalorimetry technique showed that the type of transition metal oxide added to niobia has a decisive role for acidic-basic character of investigated mixed oxides. Among the investigated mixed oxide formulations only Nb2O5-CeO2 was amphoteric, while the other samples showed prominent acidic character. All the investigated materials are catalytically active in fructose dehydration; conversion of fructose and selectivity to 5-hydroxymethylfurfural (5-HMF) and levulinic acid (LA) are proved to be dependant on the number of acidic sites on the surface of catalysts. Furthermore, presence of the basic sites on the surface of the catalyst decreases the activity in the fructose dehydration reaction, as in the case of Nb2O5-CeO2 sample.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Materials Chemistry and Physics",
title = "Tuning the acidity of niobia: Characterization and catalytic activity of Nb2O5-MeO2 (Me = Ti, Zr, Ce) mesoporous mixed oxides",
pages = "345-337",
number = "3",
volume = "146",
doi = "10.1016/j.matchemphys.2014.03.033"
}

Stošić, D., Bennici, S., Pavlović, V., Rakić, V.,& Auroux, A.. (2014). Tuning the acidity of niobia: Characterization and catalytic activity of Nb2O5-MeO2 (Me = Ti, Zr, Ce) mesoporous mixed oxides. in Materials Chemistry and Physics
Elsevier Science Sa, Lausanne., 146(3), 337-345.
https://doi.org/10.1016/j.matchemphys.2014.03.033

Stošić D, Bennici S, Pavlović V, Rakić V, Auroux A. Tuning the acidity of niobia: Characterization and catalytic activity of Nb2O5-MeO2 (Me = Ti, Zr, Ce) mesoporous mixed oxides. in Materials Chemistry and Physics. 2014;146(3):337-345.
doi:10.1016/j.matchemphys.2014.03.033 .

Stošić, Dušan, Bennici, Simona, Pavlović, Vladimir, Rakić, Vesna, Auroux, Aline, "Tuning the acidity of niobia: Characterization and catalytic activity of Nb2O5-MeO2 (Me = Ti, Zr, Ce) mesoporous mixed oxides" in Materials Chemistry and Physics, 146, no. 3 (2014):337-345,
https://doi.org/10.1016/j.matchemphys.2014.03.033 . .

TY  - CONF
AU  - Rakić, Vesna
AU  - Rajić, Nevenka
AU  - Daković, Aleksandra
AU  - Auroux, Aline
PY  - 2013
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3309
AB  - In this study, adsorption of salicylic acid, acetylsalicylic acid and atenolol from aqueous solutions onto clinoptilolite modified with sorbed metallic cations (Cu(II), Zn(II), Ni(II) or Mn(II)) have been probed. Natural clays (kaolin and bentonite, pure or ion-exchanged by octadecyl dimethyl benzyl ammonium chloride) have been also probed as adsorbents. The adsorption was studied at 30 degrees C by titration microcalorimetry, employed to obtain the heats evolved as a result of adsorption. Adsorption experiments were performed under the same conditions, the equilibrium adsorbate concentrations were determined by fluorescence spectrophotometry. The maximal adsorption capacities of investigated solids against target pharmaceuticals lie in the range of 10(-5)-10(-6) mol/g. Modified minerals have shown different capacities in comparison with natural ones. The adsorption capacities are dependent on the characteristics of pharmaceutically active compound. The results obtained in this work show that natural materials can be used effectively in the removal of investigated pharmaceuticals by adsorption.
PB  - Elsevier, Amsterdam
C3  - Microporous and Mesoporous Materials
T1  - The adsorption of salicylic acid, acetylsalicylic acid and atenolol from aqueous solutions onto natural zeolites and clays: Clinoptilolite, bentonite and kaolin
EP  - 194
SP  - 185
VL  - 166
DO  - 10.1016/j.micromeso.2012.04.049
ER  - 

@conference{
author = "Rakić, Vesna and Rajić, Nevenka and Daković, Aleksandra and Auroux, Aline",
year = "2013",
abstract = "In this study, adsorption of salicylic acid, acetylsalicylic acid and atenolol from aqueous solutions onto clinoptilolite modified with sorbed metallic cations (Cu(II), Zn(II), Ni(II) or Mn(II)) have been probed. Natural clays (kaolin and bentonite, pure or ion-exchanged by octadecyl dimethyl benzyl ammonium chloride) have been also probed as adsorbents. The adsorption was studied at 30 degrees C by titration microcalorimetry, employed to obtain the heats evolved as a result of adsorption. Adsorption experiments were performed under the same conditions, the equilibrium adsorbate concentrations were determined by fluorescence spectrophotometry. The maximal adsorption capacities of investigated solids against target pharmaceuticals lie in the range of 10(-5)-10(-6) mol/g. Modified minerals have shown different capacities in comparison with natural ones. The adsorption capacities are dependent on the characteristics of pharmaceutically active compound. The results obtained in this work show that natural materials can be used effectively in the removal of investigated pharmaceuticals by adsorption.",
publisher = "Elsevier, Amsterdam",
journal = "Microporous and Mesoporous Materials",
title = "The adsorption of salicylic acid, acetylsalicylic acid and atenolol from aqueous solutions onto natural zeolites and clays: Clinoptilolite, bentonite and kaolin",
pages = "194-185",
volume = "166",
doi = "10.1016/j.micromeso.2012.04.049"
}

Rakić, V., Rajić, N., Daković, A.,& Auroux, A.. (2013). The adsorption of salicylic acid, acetylsalicylic acid and atenolol from aqueous solutions onto natural zeolites and clays: Clinoptilolite, bentonite and kaolin. in Microporous and Mesoporous Materials
Elsevier, Amsterdam., 166, 185-194.
https://doi.org/10.1016/j.micromeso.2012.04.049

Rakić V, Rajić N, Daković A, Auroux A. The adsorption of salicylic acid, acetylsalicylic acid and atenolol from aqueous solutions onto natural zeolites and clays: Clinoptilolite, bentonite and kaolin. in Microporous and Mesoporous Materials. 2013;166:185-194.
doi:10.1016/j.micromeso.2012.04.049 .

Rakić, Vesna, Rajić, Nevenka, Daković, Aleksandra, Auroux, Aline, "The adsorption of salicylic acid, acetylsalicylic acid and atenolol from aqueous solutions onto natural zeolites and clays: Clinoptilolite, bentonite and kaolin" in Microporous and Mesoporous Materials, 166 (2013):185-194,
https://doi.org/10.1016/j.micromeso.2012.04.049 . .

TY  - JOUR
AU  - Kourieh, R.
AU  - Rakić, Vesna
AU  - Bennici, Simona
AU  - Auroux, Aline
PY  - 2013
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3297
AB  - Catalytic dehydration of fructose and its conversion to 5-hydroxymethylfurfural was studied using tungstated zirconia oxides, with various tungsten oxide loadings (1-20 wt.%). The samples were prepared by incipient wetness impregnation and thoroughly characterized using a combination of different techniques: structural, thermal and calorimetric analyses. Zirconia was predominantly present in the investigated samples in the tetragonal phase when the WO3 loading was above 10 wt.%. The samples exhibited amphoteric characteristics, as they adsorbed both ammonia and sulfur dioxide on their surface. The number of surface acid sites increased with increasing WO3 content. Fructose dehydration tests evidenced the formation of 5-hydroxymethylfurfural and by-products (formic and levulinic acids). The results show that the ratio of basic to acidic sites of the solid catalysts is the key parameter for the selectivity in 5-HMF, while the global fructose conversion was mainly related to the presence of acid sites of a given strength with 150 > Q(diff) > 100 kJ.mol(NH3)(-1).
PB  - Elsevier, Amsterdam
T2  - Catalysis Communications
T1  - Relation between surface acidity and reactivity in fructose conversion into 5-HMF using tungstated zirconia catalysts
EP  - 13
SP  - 5
VL  - 30
DO  - 10.1016/j.catcom.2012.10.005
ER  - 

@article{
author = "Kourieh, R. and Rakić, Vesna and Bennici, Simona and Auroux, Aline",
year = "2013",
abstract = "Catalytic dehydration of fructose and its conversion to 5-hydroxymethylfurfural was studied using tungstated zirconia oxides, with various tungsten oxide loadings (1-20 wt.%). The samples were prepared by incipient wetness impregnation and thoroughly characterized using a combination of different techniques: structural, thermal and calorimetric analyses. Zirconia was predominantly present in the investigated samples in the tetragonal phase when the WO3 loading was above 10 wt.%. The samples exhibited amphoteric characteristics, as they adsorbed both ammonia and sulfur dioxide on their surface. The number of surface acid sites increased with increasing WO3 content. Fructose dehydration tests evidenced the formation of 5-hydroxymethylfurfural and by-products (formic and levulinic acids). The results show that the ratio of basic to acidic sites of the solid catalysts is the key parameter for the selectivity in 5-HMF, while the global fructose conversion was mainly related to the presence of acid sites of a given strength with 150 > Q(diff) > 100 kJ.mol(NH3)(-1).",
publisher = "Elsevier, Amsterdam",
journal = "Catalysis Communications",
title = "Relation between surface acidity and reactivity in fructose conversion into 5-HMF using tungstated zirconia catalysts",
pages = "13-5",
volume = "30",
doi = "10.1016/j.catcom.2012.10.005"
}

Kourieh, R., Rakić, V., Bennici, S.,& Auroux, A.. (2013). Relation between surface acidity and reactivity in fructose conversion into 5-HMF using tungstated zirconia catalysts. in Catalysis Communications
Elsevier, Amsterdam., 30, 5-13.
https://doi.org/10.1016/j.catcom.2012.10.005

Kourieh R, Rakić V, Bennici S, Auroux A. Relation between surface acidity and reactivity in fructose conversion into 5-HMF using tungstated zirconia catalysts. in Catalysis Communications. 2013;30:5-13.
doi:10.1016/j.catcom.2012.10.005 .

Kourieh, R., Rakić, Vesna, Bennici, Simona, Auroux, Aline, "Relation between surface acidity and reactivity in fructose conversion into 5-HMF using tungstated zirconia catalysts" in Catalysis Communications, 30 (2013):5-13,
https://doi.org/10.1016/j.catcom.2012.10.005 . .

TY  - JOUR
AU  - Rac, Vladislav
AU  - Rakić, Vesna
AU  - Miladinović, Zoran
AU  - Stošić, Dušan
AU  - Auroux, Aline
PY  - 2013
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3289
AB  - The influence of the alkaline treatment on the acidity of zeolite ZSM-5 (SiO2/Al2O3 = 23, 50 and 80) modified by desilication was investigated. The samples were characterized by X-ray diffraction, low temperature adsorption of nitrogen and solid-state Al-27 MAS NMR. Acidity of the samples was investigated using microcalorimetry-volumetry of ammonia adsorption at 423 K. Acid sites accessibility and intracrystalline diffusion were estimated by the thermokinetic parameter. The desilication process was shown to be Si/Al ratio dependant. Relative enhancement of mesopore surface decreased in the following order of SiO2/Al2O3: 50 >80 >23. Pore size distribution broadened and mesopore sizes increased with increasing Si/Al ratio. For samples with SiO2/Al2O3 = 50 and 80 almost full preservation of acid sites strength and distribution was achieved. Significant alteration of the acidity was found for the mesoporous sample with SiO2/Al2O3 = 23. Thermokinetic parameter values indicate facilitated intracristalline diffusion for mesoporous samples.
PB  - Elsevier, Amsterdam
T2  - Thermochimica Acta
T1  - Influence of the desilication process on the acidity of HZSM-5 zeolite
EP  - 78
SP  - 73
VL  - 567
DO  - 10.1016/j.tca.2013.01.008
ER  - 

@article{
author = "Rac, Vladislav and Rakić, Vesna and Miladinović, Zoran and Stošić, Dušan and Auroux, Aline",
year = "2013",
abstract = "The influence of the alkaline treatment on the acidity of zeolite ZSM-5 (SiO2/Al2O3 = 23, 50 and 80) modified by desilication was investigated. The samples were characterized by X-ray diffraction, low temperature adsorption of nitrogen and solid-state Al-27 MAS NMR. Acidity of the samples was investigated using microcalorimetry-volumetry of ammonia adsorption at 423 K. Acid sites accessibility and intracrystalline diffusion were estimated by the thermokinetic parameter. The desilication process was shown to be Si/Al ratio dependant. Relative enhancement of mesopore surface decreased in the following order of SiO2/Al2O3: 50 >80 >23. Pore size distribution broadened and mesopore sizes increased with increasing Si/Al ratio. For samples with SiO2/Al2O3 = 50 and 80 almost full preservation of acid sites strength and distribution was achieved. Significant alteration of the acidity was found for the mesoporous sample with SiO2/Al2O3 = 23. Thermokinetic parameter values indicate facilitated intracristalline diffusion for mesoporous samples.",
publisher = "Elsevier, Amsterdam",
journal = "Thermochimica Acta",
title = "Influence of the desilication process on the acidity of HZSM-5 zeolite",
pages = "78-73",
volume = "567",
doi = "10.1016/j.tca.2013.01.008"
}

Rac, V., Rakić, V., Miladinović, Z., Stošić, D.,& Auroux, A.. (2013). Influence of the desilication process on the acidity of HZSM-5 zeolite. in Thermochimica Acta
Elsevier, Amsterdam., 567, 73-78.
https://doi.org/10.1016/j.tca.2013.01.008

Rac V, Rakić V, Miladinović Z, Stošić D, Auroux A. Influence of the desilication process on the acidity of HZSM-5 zeolite. in Thermochimica Acta. 2013;567:73-78.
doi:10.1016/j.tca.2013.01.008 .

Rac, Vladislav, Rakić, Vesna, Miladinović, Zoran, Stošić, Dušan, Auroux, Aline, "Influence of the desilication process on the acidity of HZSM-5 zeolite" in Thermochimica Acta, 567 (2013):73-78,
https://doi.org/10.1016/j.tca.2013.01.008 . .

TY  - JOUR
AU  - Hercigonja, Radmila
AU  - Rac, Vladislav
AU  - Rakić, Vesna
AU  - Auroux, Aline
PY  - 2012
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2994
AB  - In this work, the values of entropy changes related to n-hexane adsorption onto ion-exchanged ZSM-5 zeolites were calculated from differential heats, obtained from microcalorimetric experiments. The existence of enthalpy-entropy compensation effect, evidenced by the linearity of -Lambda H vs. -Lambda S plots and characteristic for all investigated ZSM-5 zeolites, was found. In the case of ZSM-5 structure, modifying the zeolite structure by ion-exchange gives rise to changes in the heats of adsorption and adsorption entropy in the same manner. The factors that can influence the appearance of entropy-enthalpy compensation were discussed. It was found that compensation effect is governed by ion-induced dipole interaction between highly polarizing cationic centres in zeolite and nonopolar n-hexane molecules, and hence, depends on the size, charge and electron configuration of the cation. It was found also that the compensation temperature is in correlation with the number of zeolites' strong acid centres. Contrary to the adsorption of n-hexane on ZSM-5 zeolites, compensation effect was not found for the adsorption of the same gas on faujasite-type zeolites.
PB  - Academic Press Ltd- Elsevier Science Ltd, London
T2  - Journal of Chemical Thermodynamics
T1  - Enthalpy-entropy compensation for n-hexane adsorption on HZSM-5 containing transition metal ions
EP  - 117
SP  - 112
VL  - 48
DO  - 10.1016/j.jct.2011.12.016
ER  - 

@article{
author = "Hercigonja, Radmila and Rac, Vladislav and Rakić, Vesna and Auroux, Aline",
year = "2012",
abstract = "In this work, the values of entropy changes related to n-hexane adsorption onto ion-exchanged ZSM-5 zeolites were calculated from differential heats, obtained from microcalorimetric experiments. The existence of enthalpy-entropy compensation effect, evidenced by the linearity of -Lambda H vs. -Lambda S plots and characteristic for all investigated ZSM-5 zeolites, was found. In the case of ZSM-5 structure, modifying the zeolite structure by ion-exchange gives rise to changes in the heats of adsorption and adsorption entropy in the same manner. The factors that can influence the appearance of entropy-enthalpy compensation were discussed. It was found that compensation effect is governed by ion-induced dipole interaction between highly polarizing cationic centres in zeolite and nonopolar n-hexane molecules, and hence, depends on the size, charge and electron configuration of the cation. It was found also that the compensation temperature is in correlation with the number of zeolites' strong acid centres. Contrary to the adsorption of n-hexane on ZSM-5 zeolites, compensation effect was not found for the adsorption of the same gas on faujasite-type zeolites.",
publisher = "Academic Press Ltd- Elsevier Science Ltd, London",
journal = "Journal of Chemical Thermodynamics",
title = "Enthalpy-entropy compensation for n-hexane adsorption on HZSM-5 containing transition metal ions",
pages = "117-112",
volume = "48",
doi = "10.1016/j.jct.2011.12.016"
}

Hercigonja, R., Rac, V., Rakić, V.,& Auroux, A.. (2012). Enthalpy-entropy compensation for n-hexane adsorption on HZSM-5 containing transition metal ions. in Journal of Chemical Thermodynamics
Academic Press Ltd- Elsevier Science Ltd, London., 48, 112-117.
https://doi.org/10.1016/j.jct.2011.12.016

Hercigonja R, Rac V, Rakić V, Auroux A. Enthalpy-entropy compensation for n-hexane adsorption on HZSM-5 containing transition metal ions. in Journal of Chemical Thermodynamics. 2012;48:112-117.
doi:10.1016/j.jct.2011.12.016 .

Hercigonja, Radmila, Rac, Vladislav, Rakić, Vesna, Auroux, Aline, "Enthalpy-entropy compensation for n-hexane adsorption on HZSM-5 containing transition metal ions" in Journal of Chemical Thermodynamics, 48 (2012):112-117,
https://doi.org/10.1016/j.jct.2011.12.016 . .

TY  - CONF
AU  - Stošić, Dušan
AU  - Bennici, Simona
AU  - Rakić, Vesna
AU  - Auroux, Aline
PY  - 2012
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2987
AB  - In this work, ceria-niobia mixed oxides have been prepared by coprecipitation. The structural, textural, and surface properties of these materials have been fully characterized using appropriate techniques (low-temperature adsorption-desorption of nitrogen, thermogravimetric analysis, X-ray diffraction analysis (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy and temperature-programmed reduction/oxidation (TPR/O)). The acid-base properties were estimated by the adsorption of appropriate probe molecules - NH3 or SO2 were used to estimate the population, strength and strength distribution of acid or basic sites, by means of adsorption microcalorimetry. The nature of acidic sites was determined through the adsorption/desorption of pyridine, studied by infrared spectroscopy. New phases between the oxides were not formed, while there is evidence of interaction between them, as revealed by XRD and Raman spectroscopy. All investigated mixed oxide samples are amphoteric and possess red-ox centers on their surface. Both red-ox and acid-base properties are dependent on the ratio of ceria to niobia in the samples. Both Lewis and Brnsted acid sites are present on the surface of the mixed oxides. In order to check catalytic abilities of these materials, reaction of fructose dehydration has been performed. All the investigated materials are catalytically active in fructose dehydration; conversion of fructose and selectivity to 5-hydroxymethylfurfural (5-HMF) improved with increasing content of niobia in the samples.
PB  - Elsevier Science Bv, Amsterdam
C3  - Catalysis Today
T1  - CeO2-Nb2O5 mixed oxide catalysts: Preparation, characterization and catalytic activity in fructose dehydration reaction
EP  - 168
IS  - 1
SP  - 160
VL  - 192
DO  - 10.1016/j.cattod.2011.10.040
ER  - 

@conference{
author = "Stošić, Dušan and Bennici, Simona and Rakić, Vesna and Auroux, Aline",
year = "2012",
abstract = "In this work, ceria-niobia mixed oxides have been prepared by coprecipitation. The structural, textural, and surface properties of these materials have been fully characterized using appropriate techniques (low-temperature adsorption-desorption of nitrogen, thermogravimetric analysis, X-ray diffraction analysis (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy and temperature-programmed reduction/oxidation (TPR/O)). The acid-base properties were estimated by the adsorption of appropriate probe molecules - NH3 or SO2 were used to estimate the population, strength and strength distribution of acid or basic sites, by means of adsorption microcalorimetry. The nature of acidic sites was determined through the adsorption/desorption of pyridine, studied by infrared spectroscopy. New phases between the oxides were not formed, while there is evidence of interaction between them, as revealed by XRD and Raman spectroscopy. All investigated mixed oxide samples are amphoteric and possess red-ox centers on their surface. Both red-ox and acid-base properties are dependent on the ratio of ceria to niobia in the samples. Both Lewis and Brnsted acid sites are present on the surface of the mixed oxides. In order to check catalytic abilities of these materials, reaction of fructose dehydration has been performed. All the investigated materials are catalytically active in fructose dehydration; conversion of fructose and selectivity to 5-hydroxymethylfurfural (5-HMF) improved with increasing content of niobia in the samples.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Catalysis Today",
title = "CeO2-Nb2O5 mixed oxide catalysts: Preparation, characterization and catalytic activity in fructose dehydration reaction",
pages = "168-160",
number = "1",
volume = "192",
doi = "10.1016/j.cattod.2011.10.040"
}

Stošić, D., Bennici, S., Rakić, V.,& Auroux, A.. (2012). CeO2-Nb2O5 mixed oxide catalysts: Preparation, characterization and catalytic activity in fructose dehydration reaction. in Catalysis Today
Elsevier Science Bv, Amsterdam., 192(1), 160-168.
https://doi.org/10.1016/j.cattod.2011.10.040

Stošić D, Bennici S, Rakić V, Auroux A. CeO2-Nb2O5 mixed oxide catalysts: Preparation, characterization and catalytic activity in fructose dehydration reaction. in Catalysis Today. 2012;192(1):160-168.
doi:10.1016/j.cattod.2011.10.040 .

Stošić, Dušan, Bennici, Simona, Rakić, Vesna, Auroux, Aline, "CeO2-Nb2O5 mixed oxide catalysts: Preparation, characterization and catalytic activity in fructose dehydration reaction" in Catalysis Today, 192, no. 1 (2012):160-168,
https://doi.org/10.1016/j.cattod.2011.10.040 . .

TY  - CONF
AU  - Dragoi, B.
AU  - Rakić, Vesna
AU  - Dumitriu, E.
AU  - Auroux, Aline
PY  - 2010
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2406
AB  - This work is focused on the gas and liquid-phase adsorption of pollutants: propanol, 2-butanone, phenol and nicotine onto zeolites (H-BETA, H-ZSM-5, H-MCM-22, and clinoptilolite). Textural properties and origin of zeolites were taken into account as criteria of adsorbents selection. The aldehyde and the ketone were adsorbed in the gas phase using microcalorimetry linked to a volumetric line to evaluate adsorption. Adsorptions in water were carried out for phenol and nicotine and the evolved heats during adsorption were measured by a differential heat flow reaction calorimeter with stirring. Results are discussed in relation with the pore sizes and various interactions which could occur between the adsorbent and the adsorbate.
PB  - Springer, Dordrecht
C3  - Journal of Thermal Analysis and Calorimetry
T1  - Adsorption of organic pollutants over microporous solids investigated by microcalorimetry techniques
EP  - 740
IS  - 3
SP  - 733
VL  - 99
DO  - 10.1007/s10973-009-0353-4
ER  - 

@conference{
author = "Dragoi, B. and Rakić, Vesna and Dumitriu, E. and Auroux, Aline",
year = "2010",
abstract = "This work is focused on the gas and liquid-phase adsorption of pollutants: propanol, 2-butanone, phenol and nicotine onto zeolites (H-BETA, H-ZSM-5, H-MCM-22, and clinoptilolite). Textural properties and origin of zeolites were taken into account as criteria of adsorbents selection. The aldehyde and the ketone were adsorbed in the gas phase using microcalorimetry linked to a volumetric line to evaluate adsorption. Adsorptions in water were carried out for phenol and nicotine and the evolved heats during adsorption were measured by a differential heat flow reaction calorimeter with stirring. Results are discussed in relation with the pore sizes and various interactions which could occur between the adsorbent and the adsorbate.",
publisher = "Springer, Dordrecht",
journal = "Journal of Thermal Analysis and Calorimetry",
title = "Adsorption of organic pollutants over microporous solids investigated by microcalorimetry techniques",
pages = "740-733",
number = "3",
volume = "99",
doi = "10.1007/s10973-009-0353-4"
}

Dragoi, B., Rakić, V., Dumitriu, E.,& Auroux, A.. (2010). Adsorption of organic pollutants over microporous solids investigated by microcalorimetry techniques. in Journal of Thermal Analysis and Calorimetry
Springer, Dordrecht., 99(3), 733-740.
https://doi.org/10.1007/s10973-009-0353-4

Dragoi B, Rakić V, Dumitriu E, Auroux A. Adsorption of organic pollutants over microporous solids investigated by microcalorimetry techniques. in Journal of Thermal Analysis and Calorimetry. 2010;99(3):733-740.
doi:10.1007/s10973-009-0353-4 .

Dragoi, B., Rakić, Vesna, Dumitriu, E., Auroux, Aline, "Adsorption of organic pollutants over microporous solids investigated by microcalorimetry techniques" in Journal of Thermal Analysis and Calorimetry, 99, no. 3 (2010):733-740,
https://doi.org/10.1007/s10973-009-0353-4 . .

TY  - JOUR
AU  - Rakić, Vesna
AU  - Damjanović, Ljiljana
AU  - Rac, Vladislav
AU  - Stošić, Dušan
AU  - Dondur, Vera
AU  - Auroux, Aline
PY  - 2010
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2397
AB  - The present work is focused on the adsorption of nicotine from aqueous solutions. Based on the data available in the literature, serious concern is claimed regarding the appearance of nicotine in ground, surface and municipal wastewaters. In order to investigate the possibility of abatement by adsorption, three different types of zeolites (BEA, MFI and HEU) have been applied as adsorbents. In addition, the adsorption was per-formed on activated carbon, a solid customarily used for removal of pollutants from water. The adsorption of nicotine was studied by isothermal microcalorimetry, which provided the heats evolved as a result of adsorption. The values of these heats revealed that the investigated solids are energetically heterogeneous for the adsorption of nicotine from aqueous solution. Additionally, the amounts of adsorbed pollutant were determined and presented in the form of adsorption isotherms. The obtained adsorption isotherms were interpreted using Langmuir, Freundlich, and Sips equations; the latter was found to express high level of agreement with experimental data of nicotine adsorption on the investigated solids. The possibilities to regenerate the adsorbents were examined by means of thermogravimetry coupled with mass spectrometry. From all obtained results, it was possible to distinguish zeolite BEA as a material which possesses the capacity for adsorption of nicotine comparable to that of activated carbon.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Water Research
T1  - The adsorption of nicotine from aqueous solutions on different zeolite structures
EP  - 2057
IS  - 6
SP  - 2047
VL  - 44
DO  - 10.1016/j.watres.2009.12.019
ER  - 

@article{
author = "Rakić, Vesna and Damjanović, Ljiljana and Rac, Vladislav and Stošić, Dušan and Dondur, Vera and Auroux, Aline",
year = "2010",
abstract = "The present work is focused on the adsorption of nicotine from aqueous solutions. Based on the data available in the literature, serious concern is claimed regarding the appearance of nicotine in ground, surface and municipal wastewaters. In order to investigate the possibility of abatement by adsorption, three different types of zeolites (BEA, MFI and HEU) have been applied as adsorbents. In addition, the adsorption was per-formed on activated carbon, a solid customarily used for removal of pollutants from water. The adsorption of nicotine was studied by isothermal microcalorimetry, which provided the heats evolved as a result of adsorption. The values of these heats revealed that the investigated solids are energetically heterogeneous for the adsorption of nicotine from aqueous solution. Additionally, the amounts of adsorbed pollutant were determined and presented in the form of adsorption isotherms. The obtained adsorption isotherms were interpreted using Langmuir, Freundlich, and Sips equations; the latter was found to express high level of agreement with experimental data of nicotine adsorption on the investigated solids. The possibilities to regenerate the adsorbents were examined by means of thermogravimetry coupled with mass spectrometry. From all obtained results, it was possible to distinguish zeolite BEA as a material which possesses the capacity for adsorption of nicotine comparable to that of activated carbon.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Water Research",
title = "The adsorption of nicotine from aqueous solutions on different zeolite structures",
pages = "2057-2047",
number = "6",
volume = "44",
doi = "10.1016/j.watres.2009.12.019"
}

Rakić, V., Damjanović, L., Rac, V., Stošić, D., Dondur, V.,& Auroux, A.. (2010). The adsorption of nicotine from aqueous solutions on different zeolite structures. in Water Research
Pergamon-Elsevier Science Ltd, Oxford., 44(6), 2047-2057.
https://doi.org/10.1016/j.watres.2009.12.019

Rakić V, Damjanović L, Rac V, Stošić D, Dondur V, Auroux A. The adsorption of nicotine from aqueous solutions on different zeolite structures. in Water Research. 2010;44(6):2047-2057.
doi:10.1016/j.watres.2009.12.019 .

Rakić, Vesna, Damjanović, Ljiljana, Rac, Vladislav, Stošić, Dušan, Dondur, Vera, Auroux, Aline, "The adsorption of nicotine from aqueous solutions on different zeolite structures" in Water Research, 44, no. 6 (2010):2047-2057,
https://doi.org/10.1016/j.watres.2009.12.019 . .

TY  - JOUR
AU  - Damjanović, Ljiljana
AU  - Rakić, Vesna
AU  - Rac, Vladislav
AU  - Stošić, Dušan
AU  - Auroux, Aline
PY  - 2010
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2364
AB  - This work reports results on phenol adsorption from aqueous solutions on synthetic BEA (beta) and MFI (ZSM-5) zeolites, studied by heat-flow microcalorimetry. For the sake of comparison, the adsorption was performed on activated carbon, a solid customarily used for removal of phenol from water. The obtained values of heats evolved during phenol adsorption indicate the heterogeneity of active sites present on the investigated systems for the adsorption of phenol. In addition, the amounts of adsorbed pollutant were determined and presented in the form of adsorption isotherms, which were interpreted using Langmuir, Freundlich, Dubinin-Astakov and Sips' equations. The latter was found to express high level of agreement with experimental data. The results obtained in this work reveal that the adsorption of phenol on zeolites depends on both Si/Al ratio and on the pore size. Hydrophobic zeolites that possess higher contents of Si show higher affinities for phenol adsorption. Among investigated zeolites, zeolite beta possesses the highest capacity for adsorption of phenol. The possibility of regeneration of used adsorbents was investigated by thermal desorption technique. It has been shown that in the case of beta zeolite the majority of adsorbed phenol is easily released in the low temperature region.
PB  - Elsevier, Amsterdam
T2  - Journal of Hazardous Materials
T1  - The investigation of phenol removal from aqueous solutions by zeolites as solid adsorbents
EP  - 484
IS  - 1-3
SP  - 477
VL  - 184
DO  - 10.1016/j.jhazmat.2010.08.059
ER  - 

@article{
author = "Damjanović, Ljiljana and Rakić, Vesna and Rac, Vladislav and Stošić, Dušan and Auroux, Aline",
year = "2010",
abstract = "This work reports results on phenol adsorption from aqueous solutions on synthetic BEA (beta) and MFI (ZSM-5) zeolites, studied by heat-flow microcalorimetry. For the sake of comparison, the adsorption was performed on activated carbon, a solid customarily used for removal of phenol from water. The obtained values of heats evolved during phenol adsorption indicate the heterogeneity of active sites present on the investigated systems for the adsorption of phenol. In addition, the amounts of adsorbed pollutant were determined and presented in the form of adsorption isotherms, which were interpreted using Langmuir, Freundlich, Dubinin-Astakov and Sips' equations. The latter was found to express high level of agreement with experimental data. The results obtained in this work reveal that the adsorption of phenol on zeolites depends on both Si/Al ratio and on the pore size. Hydrophobic zeolites that possess higher contents of Si show higher affinities for phenol adsorption. Among investigated zeolites, zeolite beta possesses the highest capacity for adsorption of phenol. The possibility of regeneration of used adsorbents was investigated by thermal desorption technique. It has been shown that in the case of beta zeolite the majority of adsorbed phenol is easily released in the low temperature region.",
publisher = "Elsevier, Amsterdam",
journal = "Journal of Hazardous Materials",
title = "The investigation of phenol removal from aqueous solutions by zeolites as solid adsorbents",
pages = "484-477",
number = "1-3",
volume = "184",
doi = "10.1016/j.jhazmat.2010.08.059"
}

Damjanović, L., Rakić, V., Rac, V., Stošić, D.,& Auroux, A.. (2010). The investigation of phenol removal from aqueous solutions by zeolites as solid adsorbents. in Journal of Hazardous Materials
Elsevier, Amsterdam., 184(1-3), 477-484.
https://doi.org/10.1016/j.jhazmat.2010.08.059

Damjanović L, Rakić V, Rac V, Stošić D, Auroux A. The investigation of phenol removal from aqueous solutions by zeolites as solid adsorbents. in Journal of Hazardous Materials. 2010;184(1-3):477-484.
doi:10.1016/j.jhazmat.2010.08.059 .

Damjanović, Ljiljana, Rakić, Vesna, Rac, Vladislav, Stošić, Dušan, Auroux, Aline, "The investigation of phenol removal from aqueous solutions by zeolites as solid adsorbents" in Journal of Hazardous Materials, 184, no. 1-3 (2010):477-484,
https://doi.org/10.1016/j.jhazmat.2010.08.059 . .

TY  - JOUR
AU  - Bonnetot, B.
AU  - Rakić, Vesna
AU  - Yuzhakova, T.
AU  - Guimon, C.
AU  - Auroux, Aline
PY  - 2008
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1828
AB  - The present work focuses on the combination of ceria mixed with another oxide from group III, using the sol-gel method. B2O3- Al2O3- Ga2O3- or In2O3-CeO2 mixed oxides have been prepared in order to improve the catalytic properties of these materials. The structural, textural, and surface properties of these catalysts have been fully characterized by means of a variety of techniques (Brunauer-Emmett-Teller, BET; X-ray diffraction analysis, XRD; Raman; scanning electron microscopy, SEM; thermogravimetric analysis, TG; and temperature-programmed reduction/oxidation, TPR-TPO). The highest surface area was achieved for the Al2O3-CeO2 mixed oxide. Only the fluorite structure of CeO2 was observed by XRD for all prepared mixed oxides; the presence of oxygen vacancies was proven by Raman spectroscopy. The acid-base properties were estimated by the adsorption of probe molecules (NH3 and SO2); two methods, microcalorimetry and X-ray photoelectron spectroscopy (XPS), have been employed for that purpose. All investigated mixed oxides express surface amphoteric character; however, it seems that surface basicity is more pronounced than surface acidity. The surface bacisity, which is mainly of the Bronsted type, has been found as dependent on the character of the group III metal. Red-ox properties were investigated for the In2O3-CeO2 sample, the achieved degree of reduction being 34%. TPR/TPO experiments performed up to 830 degrees C irreversibly changed the morphology and the structure of the samples, leading to the crystallization of In2O3.
PB  - Amer Chemical Soc, Washington
T2  - Chemistry of Materials
T1  - Preparation and characterization of Me2O3-CeO2 (Me = B, Al, Ga, In) mixed oxide catalysts. 2. Preparation by sol-gel method
EP  - 1596
IS  - 4
SP  - 1585
VL  - 20
DO  - 10.1021/cm071809e
ER  - 

@article{
author = "Bonnetot, B. and Rakić, Vesna and Yuzhakova, T. and Guimon, C. and Auroux, Aline",
year = "2008",
abstract = "The present work focuses on the combination of ceria mixed with another oxide from group III, using the sol-gel method. B2O3- Al2O3- Ga2O3- or In2O3-CeO2 mixed oxides have been prepared in order to improve the catalytic properties of these materials. The structural, textural, and surface properties of these catalysts have been fully characterized by means of a variety of techniques (Brunauer-Emmett-Teller, BET; X-ray diffraction analysis, XRD; Raman; scanning electron microscopy, SEM; thermogravimetric analysis, TG; and temperature-programmed reduction/oxidation, TPR-TPO). The highest surface area was achieved for the Al2O3-CeO2 mixed oxide. Only the fluorite structure of CeO2 was observed by XRD for all prepared mixed oxides; the presence of oxygen vacancies was proven by Raman spectroscopy. The acid-base properties were estimated by the adsorption of probe molecules (NH3 and SO2); two methods, microcalorimetry and X-ray photoelectron spectroscopy (XPS), have been employed for that purpose. All investigated mixed oxides express surface amphoteric character; however, it seems that surface basicity is more pronounced than surface acidity. The surface bacisity, which is mainly of the Bronsted type, has been found as dependent on the character of the group III metal. Red-ox properties were investigated for the In2O3-CeO2 sample, the achieved degree of reduction being 34%. TPR/TPO experiments performed up to 830 degrees C irreversibly changed the morphology and the structure of the samples, leading to the crystallization of In2O3.",
publisher = "Amer Chemical Soc, Washington",
journal = "Chemistry of Materials",
title = "Preparation and characterization of Me2O3-CeO2 (Me = B, Al, Ga, In) mixed oxide catalysts. 2. Preparation by sol-gel method",
pages = "1596-1585",
number = "4",
volume = "20",
doi = "10.1021/cm071809e"
}

Bonnetot, B., Rakić, V., Yuzhakova, T., Guimon, C.,& Auroux, A.. (2008). Preparation and characterization of Me2O3-CeO2 (Me = B, Al, Ga, In) mixed oxide catalysts. 2. Preparation by sol-gel method. in Chemistry of Materials
Amer Chemical Soc, Washington., 20(4), 1585-1596.
https://doi.org/10.1021/cm071809e

Bonnetot B, Rakić V, Yuzhakova T, Guimon C, Auroux A. Preparation and characterization of Me2O3-CeO2 (Me = B, Al, Ga, In) mixed oxide catalysts. 2. Preparation by sol-gel method. in Chemistry of Materials. 2008;20(4):1585-1596.
doi:10.1021/cm071809e .

Bonnetot, B., Rakić, Vesna, Yuzhakova, T., Guimon, C., Auroux, Aline, "Preparation and characterization of Me2O3-CeO2 (Me = B, Al, Ga, In) mixed oxide catalysts. 2. Preparation by sol-gel method" in Chemistry of Materials, 20, no. 4 (2008):1585-1596,
https://doi.org/10.1021/cm071809e . .

TY  - JOUR
AU  - Yuzhakova, T.
AU  - Rakić, Vesna
AU  - Guimon, C.
AU  - Auroux, Aline
PY  - 2007
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1491
AB  - The present work is focused on the synthesis and characterization of ceria-based mixed oxides. Ceria was combined with the other oxides from group III, with the intention of improving the catalytic properties I of thus obtained materials. (B2O3, Al2O3, Ga2O3, In2O3)-CeO2 mixed oxides with a wide range of Me2O3 contents have been prepared by a coprecipitation route. The obtained solid materials have been characterized in terms of their structural, textural, and surface properties, including the acid-base and red-ox features, by a variety of techniques (BET, XRD, Raman, SEM, TG, TPR-TPO). The acid-base properties were estimated by the adsorption of probe molecules (NH3 and SOA investigated by the use of two techniques: microcalorimetry and XPS. The obtained materials exhibited satisfactory homogeneity; the highest surface areas were achieved for Al2O3-CeO2 mixed oxides. Only the fluorite structure of CeO2 was observed by XRD for all prepared mixed oxides, along with the presence of oxygen vacancies, which has been proven by Raman spectroscopy. Red-ox properties were investigated for In2O3-CeO2 samples. The degree of reduction decreased with In2O3 loading. Besides, the reduction -oxidation cycle, performed up to 830 degrees C, changed the morphology and structure of the samples irreversibly, leading to crystallization of In2O3. Among all investigated materials, only boria created significant acidity, whereas the basicity has been found to be dependent on the nature and amount of group III metal.
PB  - Amer Chemical Soc, Washington
T2  - Chemistry of Materials
T1  - Preparation and characterization of Me2O3-CeO2 (Me = B, Al, Ga, In) mixed-oxide catalysts
EP  - 2981
IS  - 12
SP  - 2970
VL  - 19
DO  - 10.1021/cm062912r
ER  - 

@article{
author = "Yuzhakova, T. and Rakić, Vesna and Guimon, C. and Auroux, Aline",
year = "2007",
abstract = "The present work is focused on the synthesis and characterization of ceria-based mixed oxides. Ceria was combined with the other oxides from group III, with the intention of improving the catalytic properties I of thus obtained materials. (B2O3, Al2O3, Ga2O3, In2O3)-CeO2 mixed oxides with a wide range of Me2O3 contents have been prepared by a coprecipitation route. The obtained solid materials have been characterized in terms of their structural, textural, and surface properties, including the acid-base and red-ox features, by a variety of techniques (BET, XRD, Raman, SEM, TG, TPR-TPO). The acid-base properties were estimated by the adsorption of probe molecules (NH3 and SOA investigated by the use of two techniques: microcalorimetry and XPS. The obtained materials exhibited satisfactory homogeneity; the highest surface areas were achieved for Al2O3-CeO2 mixed oxides. Only the fluorite structure of CeO2 was observed by XRD for all prepared mixed oxides, along with the presence of oxygen vacancies, which has been proven by Raman spectroscopy. Red-ox properties were investigated for In2O3-CeO2 samples. The degree of reduction decreased with In2O3 loading. Besides, the reduction -oxidation cycle, performed up to 830 degrees C, changed the morphology and structure of the samples irreversibly, leading to crystallization of In2O3. Among all investigated materials, only boria created significant acidity, whereas the basicity has been found to be dependent on the nature and amount of group III metal.",
publisher = "Amer Chemical Soc, Washington",
journal = "Chemistry of Materials",
title = "Preparation and characterization of Me2O3-CeO2 (Me = B, Al, Ga, In) mixed-oxide catalysts",
pages = "2981-2970",
number = "12",
volume = "19",
doi = "10.1021/cm062912r"
}

Yuzhakova, T., Rakić, V., Guimon, C.,& Auroux, A.. (2007). Preparation and characterization of Me2O3-CeO2 (Me = B, Al, Ga, In) mixed-oxide catalysts. in Chemistry of Materials
Amer Chemical Soc, Washington., 19(12), 2970-2981.
https://doi.org/10.1021/cm062912r

Yuzhakova T, Rakić V, Guimon C, Auroux A. Preparation and characterization of Me2O3-CeO2 (Me = B, Al, Ga, In) mixed-oxide catalysts. in Chemistry of Materials. 2007;19(12):2970-2981.
doi:10.1021/cm062912r .

Yuzhakova, T., Rakić, Vesna, Guimon, C., Auroux, Aline, "Preparation and characterization of Me2O3-CeO2 (Me = B, Al, Ga, In) mixed-oxide catalysts" in Chemistry of Materials, 19, no. 12 (2007):2970-2981,
https://doi.org/10.1021/cm062912r . .

TY  - CONF
AU  - Rac, Vladislav
AU  - Rakić, Vesna
AU  - Gajinov, S.
AU  - Dondur, Vera
AU  - Auroux, Aline
PY  - 2006
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1342
AB  - In this work, room temperature interaction of n-hexane with HZSM-5 (Si/Al=20) and ion-exchanged samples containing one (CuZSM-5, FeZSM-5 and MnZSM-5) or two transition-metal cations (Fe,CuZSM-5; Cu,MnZSM-5 and Fe,MnZSM-5) was studied by microcalorimetry and TPD methods. Both differential heats and the amounts of n-hexane adsorbed per one unit cell were quantitatively determined. Higher heats of adsorption and higher amounts of adsorbed gas were found for ion-exchanged samples than for HZSM-5. The experiments of n-hexane adsorption on hydrated samples were also performed. The amounts of n-hexane adsorbed on hydrated ZSM-5 were lower in comparison with dehydrated samples, while the energies of interaction were similar.
PB  - Springer, Dordrecht
C3  - Journal of Thermal Analysis and Calorimetry
T1  - Room-temperature interaction of n-hexane with ZSM-5 zeolites - Microcalorimetric and temperature-programmed desorption studies
EP  - 245
IS  - 1
SP  - 239
VL  - 84
DO  - 10.1007/s10973-005-7164-z
ER  - 

@conference{
author = "Rac, Vladislav and Rakić, Vesna and Gajinov, S. and Dondur, Vera and Auroux, Aline",
year = "2006",
abstract = "In this work, room temperature interaction of n-hexane with HZSM-5 (Si/Al=20) and ion-exchanged samples containing one (CuZSM-5, FeZSM-5 and MnZSM-5) or two transition-metal cations (Fe,CuZSM-5; Cu,MnZSM-5 and Fe,MnZSM-5) was studied by microcalorimetry and TPD methods. Both differential heats and the amounts of n-hexane adsorbed per one unit cell were quantitatively determined. Higher heats of adsorption and higher amounts of adsorbed gas were found for ion-exchanged samples than for HZSM-5. The experiments of n-hexane adsorption on hydrated samples were also performed. The amounts of n-hexane adsorbed on hydrated ZSM-5 were lower in comparison with dehydrated samples, while the energies of interaction were similar.",
publisher = "Springer, Dordrecht",
journal = "Journal of Thermal Analysis and Calorimetry",
title = "Room-temperature interaction of n-hexane with ZSM-5 zeolites - Microcalorimetric and temperature-programmed desorption studies",
pages = "245-239",
number = "1",
volume = "84",
doi = "10.1007/s10973-005-7164-z"
}

Rac, V., Rakić, V., Gajinov, S., Dondur, V.,& Auroux, A.. (2006). Room-temperature interaction of n-hexane with ZSM-5 zeolites - Microcalorimetric and temperature-programmed desorption studies. in Journal of Thermal Analysis and Calorimetry
Springer, Dordrecht., 84(1), 239-245.
https://doi.org/10.1007/s10973-005-7164-z

Rac V, Rakić V, Gajinov S, Dondur V, Auroux A. Room-temperature interaction of n-hexane with ZSM-5 zeolites - Microcalorimetric and temperature-programmed desorption studies. in Journal of Thermal Analysis and Calorimetry. 2006;84(1):239-245.
doi:10.1007/s10973-005-7164-z .

Rac, Vladislav, Rakić, Vesna, Gajinov, S., Dondur, Vera, Auroux, Aline, "Room-temperature interaction of n-hexane with ZSM-5 zeolites - Microcalorimetric and temperature-programmed desorption studies" in Journal of Thermal Analysis and Calorimetry, 84, no. 1 (2006):239-245,
https://doi.org/10.1007/s10973-005-7164-z . .

TY  - CONF
AU  - Dondur, Vera
AU  - Rakić, Vesna
AU  - Damjanović, Ljiljana
AU  - Hercigonja, Radmila
AU  - Auroux, Aline
PY  - 2006
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1341
AB  - Temperature-programmed desorption coupled with mass spectrometer as a detector (TPD), IR and C-13 NMR measurements are used to study the adsorption of n-hexane on hydrated HZSM-5 and NH(4)ZSM-5 zeolites. The C-13 NMR measurements show that n-hexane can access the pore structure of ZSM-5 zeolites previously saturated with water. TPD spectra of n-hexane are monitored in the temperature region 50-300 degrees C, in the case of fully or partially hydrated samples; two-stage desorption of n-hexane is found. Simultaneous desorption of water and n-hexane in the same temperature region are found, in all investigated samples.
PB  - Springer, Dordrecht
C3  - Journal of Thermal Analysis and Calorimetry
T1  - Temperature-programmed desorption of n-hexane from hydrated HZSM-5 and NH(4)ZSM-5 zeolites
EP  - 238
IS  - 1
SP  - 233
VL  - 84
DO  - 10.1007/s10973-005-7160-3
ER  - 

@conference{
author = "Dondur, Vera and Rakić, Vesna and Damjanović, Ljiljana and Hercigonja, Radmila and Auroux, Aline",
year = "2006",
abstract = "Temperature-programmed desorption coupled with mass spectrometer as a detector (TPD), IR and C-13 NMR measurements are used to study the adsorption of n-hexane on hydrated HZSM-5 and NH(4)ZSM-5 zeolites. The C-13 NMR measurements show that n-hexane can access the pore structure of ZSM-5 zeolites previously saturated with water. TPD spectra of n-hexane are monitored in the temperature region 50-300 degrees C, in the case of fully or partially hydrated samples; two-stage desorption of n-hexane is found. Simultaneous desorption of water and n-hexane in the same temperature region are found, in all investigated samples.",
publisher = "Springer, Dordrecht",
journal = "Journal of Thermal Analysis and Calorimetry",
title = "Temperature-programmed desorption of n-hexane from hydrated HZSM-5 and NH(4)ZSM-5 zeolites",
pages = "238-233",
number = "1",
volume = "84",
doi = "10.1007/s10973-005-7160-3"
}

Dondur, V., Rakić, V., Damjanović, L., Hercigonja, R.,& Auroux, A.. (2006). Temperature-programmed desorption of n-hexane from hydrated HZSM-5 and NH(4)ZSM-5 zeolites. in Journal of Thermal Analysis and Calorimetry
Springer, Dordrecht., 84(1), 233-238.
https://doi.org/10.1007/s10973-005-7160-3

Dondur V, Rakić V, Damjanović L, Hercigonja R, Auroux A. Temperature-programmed desorption of n-hexane from hydrated HZSM-5 and NH(4)ZSM-5 zeolites. in Journal of Thermal Analysis and Calorimetry. 2006;84(1):233-238.
doi:10.1007/s10973-005-7160-3 .

Dondur, Vera, Rakić, Vesna, Damjanović, Ljiljana, Hercigonja, Radmila, Auroux, Aline, "Temperature-programmed desorption of n-hexane from hydrated HZSM-5 and NH(4)ZSM-5 zeolites" in Journal of Thermal Analysis and Calorimetry, 84, no. 1 (2006):233-238,
https://doi.org/10.1007/s10973-005-7160-3 . .

TY  - JOUR
AU  - Dondur, Vera
AU  - Rakić, Vesna
AU  - Damjanović, Ljiljana
AU  - Auroux, Aline
PY  - 2005
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1014
AB  - This review summarizes some of the recently published results concerning the acid sites in the zeolites ZSM-5 and Y studied by temperature-programmed desorption (TPD) and adsorption calorimetry using different probe molecules NH3, CO, N2O and n-hexane. For the first time it has been shown that the acid sites in hydrated zeolites are accessible for n-hexane adsorption.
AB  - U ovom radu je prikazan pregled ispitivanja kiselih aktivnih centara kod zeolita ZSM-5 i Y temperaturski programiranom desorpcijom (TPD) i adsorpcionom mikrokalorimetrijom uz korišćenje različitih probnih molekula: NH3, CO, N2O i n-heksana. Prvi put je pokazana adsorpcija n-heksana na kiselim centrima hidratisanih zeolita.
PB  - Srpsko hemijsko društvo, Beograd
T2  - JOURNAL OF THE SERBIAN CHEMICAL SOCIETY
T1  - Comparative study of the active sites in zeolites by different probe molecules
T1  - Uporedno ispitivanje aktivnih centara zeolita različitim probnim molekulima
EP  - 474
IS  - 3
SP  - 457
VL  - 70
DO  - 10.2298/JSC0503457D
ER  - 

@article{
author = "Dondur, Vera and Rakić, Vesna and Damjanović, Ljiljana and Auroux, Aline",
year = "2005",
abstract = "This review summarizes some of the recently published results concerning the acid sites in the zeolites ZSM-5 and Y studied by temperature-programmed desorption (TPD) and adsorption calorimetry using different probe molecules NH3, CO, N2O and n-hexane. For the first time it has been shown that the acid sites in hydrated zeolites are accessible for n-hexane adsorption., U ovom radu je prikazan pregled ispitivanja kiselih aktivnih centara kod zeolita ZSM-5 i Y temperaturski programiranom desorpcijom (TPD) i adsorpcionom mikrokalorimetrijom uz korišćenje različitih probnih molekula: NH3, CO, N2O i n-heksana. Prvi put je pokazana adsorpcija n-heksana na kiselim centrima hidratisanih zeolita.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "JOURNAL OF THE SERBIAN CHEMICAL SOCIETY",
title = "Comparative study of the active sites in zeolites by different probe molecules, Uporedno ispitivanje aktivnih centara zeolita različitim probnim molekulima",
pages = "474-457",
number = "3",
volume = "70",
doi = "10.2298/JSC0503457D"
}

Dondur, V., Rakić, V., Damjanović, L.,& Auroux, A.. (2005). Comparative study of the active sites in zeolites by different probe molecules. in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY
Srpsko hemijsko društvo, Beograd., 70(3), 457-474.
https://doi.org/10.2298/JSC0503457D

Dondur V, Rakić V, Damjanović L, Auroux A. Comparative study of the active sites in zeolites by different probe molecules. in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY. 2005;70(3):457-474.
doi:10.2298/JSC0503457D .

Dondur, Vera, Rakić, Vesna, Damjanović, Ljiljana, Auroux, Aline, "Comparative study of the active sites in zeolites by different probe molecules" in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY, 70, no. 3 (2005):457-474,
https://doi.org/10.2298/JSC0503457D . .

TY  - CONF
AU  - Rakić, Vesna
AU  - Rac, Vladislav
AU  - Dondur, Vera
AU  - Auroux, Aline
PY  - 2005
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1004
AB  - The behavior of copper-, iron- and cobalt-exchanged ZSM-5 (Si/Al = 20) and bimetallic forms of the same zeolite was investigated with reference to the adsorption of N2O and CO at 303 K. The interactions of both gases with investigated zeolites have been studied using microcalorimetry and infrared spectroscopy. The values of differential heats of adsorption and the amounts of adsorbed gases were determined. Both gases react with the charge-balancing cations as active sites for adsorption. CuZSM-5 shows significantly better performances than FeZSM-5 and CoZSM-5, toward both gases; additionally, nitrous oxide can be chemisorbed on CuZSM-5. Adsorption capabilities of FeZSM-5 and CoZSM5 are increased with the addition of copper ions. The heats of CO interaction with copper-containing samples have been found to be higher then the heats of N2O interaction, while for FeZSM-5 and CoZSM-5 samples similar heats were detected for both gases. In the case of CuZSM-5, as a result of competitive adsorption between previously adsorbed N2O and incoming CO from the gas phase, a surface reaction is found.
PB  - Elsevier, Amsterdam
C3  - Catalysis Today
T1  - Competitive adsorption of N2O and CO on CuZSM-5, FeZSM-5, CoZSM-5 and bimetallic forms of ZSM-5 zeolite
EP  - 280
IS  - 3-4
SP  - 272
VL  - 110
DO  - 10.1016/j.cattod.2005.09.027
ER  - 

@conference{
author = "Rakić, Vesna and Rac, Vladislav and Dondur, Vera and Auroux, Aline",
year = "2005",
abstract = "The behavior of copper-, iron- and cobalt-exchanged ZSM-5 (Si/Al = 20) and bimetallic forms of the same zeolite was investigated with reference to the adsorption of N2O and CO at 303 K. The interactions of both gases with investigated zeolites have been studied using microcalorimetry and infrared spectroscopy. The values of differential heats of adsorption and the amounts of adsorbed gases were determined. Both gases react with the charge-balancing cations as active sites for adsorption. CuZSM-5 shows significantly better performances than FeZSM-5 and CoZSM-5, toward both gases; additionally, nitrous oxide can be chemisorbed on CuZSM-5. Adsorption capabilities of FeZSM-5 and CoZSM5 are increased with the addition of copper ions. The heats of CO interaction with copper-containing samples have been found to be higher then the heats of N2O interaction, while for FeZSM-5 and CoZSM-5 samples similar heats were detected for both gases. In the case of CuZSM-5, as a result of competitive adsorption between previously adsorbed N2O and incoming CO from the gas phase, a surface reaction is found.",
publisher = "Elsevier, Amsterdam",
journal = "Catalysis Today",
title = "Competitive adsorption of N2O and CO on CuZSM-5, FeZSM-5, CoZSM-5 and bimetallic forms of ZSM-5 zeolite",
pages = "280-272",
number = "3-4",
volume = "110",
doi = "10.1016/j.cattod.2005.09.027"
}

Rakić, V., Rac, V., Dondur, V.,& Auroux, A.. (2005). Competitive adsorption of N2O and CO on CuZSM-5, FeZSM-5, CoZSM-5 and bimetallic forms of ZSM-5 zeolite. in Catalysis Today
Elsevier, Amsterdam., 110(3-4), 272-280.
https://doi.org/10.1016/j.cattod.2005.09.027

Rakić V, Rac V, Dondur V, Auroux A. Competitive adsorption of N2O and CO on CuZSM-5, FeZSM-5, CoZSM-5 and bimetallic forms of ZSM-5 zeolite. in Catalysis Today. 2005;110(3-4):272-280.
doi:10.1016/j.cattod.2005.09.027 .

Rakić, Vesna, Rac, Vladislav, Dondur, Vera, Auroux, Aline, "Competitive adsorption of N2O and CO on CuZSM-5, FeZSM-5, CoZSM-5 and bimetallic forms of ZSM-5 zeolite" in Catalysis Today, 110, no. 3-4 (2005):272-280,
https://doi.org/10.1016/j.cattod.2005.09.027 . .

TY  - CONF
AU  - Rakić, Vesna
AU  - Dondur, Vera
AU  - Gajivon, S
AU  - Auroux, Aline
PY  - 2004
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/872
AB  - Copper ion-exchanged ZSM5 zeolites have been prepared with different cooper loadings from under- to over-exchanged levels. The adsorptions of N2O and CO at 303 K have been studied using calorimetric method and infrared spectroscopy. The samples were additionally characterised by ammonia adsorption at 423 K. The active sites for both N2O and CO are Cu(I) ions, which were formed as a result of pre-treatment in vacuum at 673 K. Room temperature adsorption of nitrous oxide at low equilibrium pressures (up to 66.7 Pa) resulted in small amounts of chemisorbed N2O ( lt 0.2 molecule per one Cu ion). Differential heats of N2O adsorption between 80 and 30kJ/mol were obtained. Differential heats of CO adsorption between 140 and 40 kJ/mol were obtained. The obtained amounts of chemisorbed species in the investigated systems and the values of differential heats of both nitrous oxide and carbon monoxide demonstrate the dependence on the copper content.
PB  - Elsevier, Amsterdam
C3  - Thermochimica Acta
T1  - Calorimetric study of room temperature adsorption of N2O and CO on Cu(II)-exchanged ZSM5 zeolites
EP  - 57
IS  - 1-2
SP  - 51
VL  - 420
DO  - 10.1016/j.tca.2003.12.030
ER  - 

@conference{
author = "Rakić, Vesna and Dondur, Vera and Gajivon, S and Auroux, Aline",
year = "2004",
abstract = "Copper ion-exchanged ZSM5 zeolites have been prepared with different cooper loadings from under- to over-exchanged levels. The adsorptions of N2O and CO at 303 K have been studied using calorimetric method and infrared spectroscopy. The samples were additionally characterised by ammonia adsorption at 423 K. The active sites for both N2O and CO are Cu(I) ions, which were formed as a result of pre-treatment in vacuum at 673 K. Room temperature adsorption of nitrous oxide at low equilibrium pressures (up to 66.7 Pa) resulted in small amounts of chemisorbed N2O ( lt 0.2 molecule per one Cu ion). Differential heats of N2O adsorption between 80 and 30kJ/mol were obtained. Differential heats of CO adsorption between 140 and 40 kJ/mol were obtained. The obtained amounts of chemisorbed species in the investigated systems and the values of differential heats of both nitrous oxide and carbon monoxide demonstrate the dependence on the copper content.",
publisher = "Elsevier, Amsterdam",
journal = "Thermochimica Acta",
title = "Calorimetric study of room temperature adsorption of N2O and CO on Cu(II)-exchanged ZSM5 zeolites",
pages = "57-51",
number = "1-2",
volume = "420",
doi = "10.1016/j.tca.2003.12.030"
}

Rakić, V., Dondur, V., Gajivon, S.,& Auroux, A.. (2004). Calorimetric study of room temperature adsorption of N2O and CO on Cu(II)-exchanged ZSM5 zeolites. in Thermochimica Acta
Elsevier, Amsterdam., 420(1-2), 51-57.
https://doi.org/10.1016/j.tca.2003.12.030

Rakić V, Dondur V, Gajivon S, Auroux A. Calorimetric study of room temperature adsorption of N2O and CO on Cu(II)-exchanged ZSM5 zeolites. in Thermochimica Acta. 2004;420(1-2):51-57.
doi:10.1016/j.tca.2003.12.030 .

Rakić, Vesna, Dondur, Vera, Gajivon, S, Auroux, Aline, "Calorimetric study of room temperature adsorption of N2O and CO on Cu(II)-exchanged ZSM5 zeolites" in Thermochimica Acta, 420, no. 1-2 (2004):51-57,
https://doi.org/10.1016/j.tca.2003.12.030 . .