TY  - JOUR
AU  - Obradović, Nina
AU  - Filipović, Suzana
AU  - Fahrenholtz, William G.
AU  - Marinkovic, Bojan A.
AU  - Rogan, Jelena
AU  - Lević, Steva
AU  - Đorđević, Antonije
AU  - Pavlović, Vladimir B.
UR  - https://doiserbia.nb.rs/Article.aspx?ID=0350-820X2301001O
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6372
AB  - Magnesium aluminate has the spinel structure along with good mechanical, chemical, and thermal properties. Magnesium aluminate has a wide range of applications including refractory ceramics, optically transparent ceramic windows, and armors. Its low dielectric permeability and low loss tangent enable its applications for integrated electronic devices, as well. In this paper, MgO and Al2O3 powders were mixed in a one-to-one molar ratio and calcined at temperatures ranging from 1500 to 1800o C to produce phase pure spinel. Thereafter, pellets were crushed and treated in a planetary ball mill for 60 min to obtain a fine powder. All powders were examined for phase composition, crystal structure, and morphology. The obtained results showed that by increasing the temperature, samples with higher density were synthesized. Milling for 1 h led to formation of larger particles, but finer powders after milling. XRPD and Raman spectroscopy showed disorder in the crystal structure after milling.
T2  - Science of Sintering, 55 (2023) 1-10
T1  - Morphological and structural characterization of MgAl2O4 spinel.
DO  - 10.2298/SOS2301001O
ER  - 

@article{
author = "Obradović, Nina and Filipović, Suzana and Fahrenholtz, William G. and Marinkovic, Bojan A. and Rogan, Jelena and Lević, Steva and Đorđević, Antonije and Pavlović, Vladimir B.",
abstract = "Magnesium aluminate has the spinel structure along with good mechanical, chemical, and thermal properties. Magnesium aluminate has a wide range of applications including refractory ceramics, optically transparent ceramic windows, and armors. Its low dielectric permeability and low loss tangent enable its applications for integrated electronic devices, as well. In this paper, MgO and Al2O3 powders were mixed in a one-to-one molar ratio and calcined at temperatures ranging from 1500 to 1800o C to produce phase pure spinel. Thereafter, pellets were crushed and treated in a planetary ball mill for 60 min to obtain a fine powder. All powders were examined for phase composition, crystal structure, and morphology. The obtained results showed that by increasing the temperature, samples with higher density were synthesized. Milling for 1 h led to formation of larger particles, but finer powders after milling. XRPD and Raman spectroscopy showed disorder in the crystal structure after milling.",
journal = "Science of Sintering, 55 (2023) 1-10",
title = "Morphological and structural characterization of MgAl2O4 spinel.",
doi = "10.2298/SOS2301001O"
}

Obradović, N., Filipović, S., Fahrenholtz, W. G., Marinkovic, B. A., Rogan, J., Lević, S., Đorđević, A.,& Pavlović, V. B..Morphological and structural characterization of MgAl2O4 spinel.. in Science of Sintering, 55 (2023) 1-10.
https://doi.org/10.2298/SOS2301001O

Obradović N, Filipović S, Fahrenholtz WG, Marinkovic BA, Rogan J, Lević S, Đorđević A, Pavlović VB. Morphological and structural characterization of MgAl2O4 spinel.. in Science of Sintering, 55 (2023) 1-10..
doi:10.2298/SOS2301001O .

Obradović, Nina, Filipović, Suzana, Fahrenholtz, William G., Marinkovic, Bojan A., Rogan, Jelena, Lević, Steva, Đorđević, Antonije, Pavlović, Vladimir B., "Morphological and structural characterization of MgAl2O4 spinel." in Science of Sintering, 55 (2023) 1-10,
https://doi.org/10.2298/SOS2301001O . .

TY  - JOUR
AU  - Vujančević, Jelena
AU  - Andričević, Pavao
AU  - Djokić, Veljko
AU  - Blagojević, Vladimir
AU  - Pavlović, Vera P.
AU  - Ćirković, Jovana
AU  - Horváth, Endre
AU  - Forró, László
AU  - Karoui, Abdennaceur
AU  - Pavlović, Vladimir B.
AU  - Janaćković, Djordje
PY  - 2023
UR  - https://www.mdpi.com/2073-4344/13/2/352
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6305
AB  - In this study, we report the influence of vanadium oxide (VO), as a photosensitive component, on the photoactivity of TiO2 nanotubes (TNTs). A series of TNTs of varying tube diameter were synthesized by the anodization of titanium foils at different voltages, while vanadium oxide was deposited on TNTs by wet chemical deposition. An improvement in the optical properties of nanotubes was observed after the deposition of vanadium oxide. An improvement in the optical properties (redshift in UV-Vis spectra) of TNTs and TNT/VO was noted. The photocatalytic activity was improved with increasing tube diameter, while it was weakened after the deposition of VO. Furthermore, photoactivity was investigated in photodiodes based on TNTs or TNT/VO and single crystals of CH3NH3PbI3. The photoelectric measurement revealed that different TNT diameters did not influence the I-V characteristic of the photodiodes, while the deposition of VO improved the photocurrent for smaller TNTs.
T2  - Catalysts
T2  - Catalysts
T1  - Effect of the Deposition of Vanadium-Oxide on the Photocatalytic Activity of TiO2 Nanotubes and Its Photodiode Performance Interfaced with CH3NH3PbI3 Single Crystal
IS  - 2
SP  - 352
VL  - 13
DO  - 10.3390/catal13020352
ER  - 

@article{
author = "Vujančević, Jelena and Andričević, Pavao and Djokić, Veljko and Blagojević, Vladimir and Pavlović, Vera P. and Ćirković, Jovana and Horváth, Endre and Forró, László and Karoui, Abdennaceur and Pavlović, Vladimir B. and Janaćković, Djordje",
year = "2023",
abstract = "In this study, we report the influence of vanadium oxide (VO), as a photosensitive component, on the photoactivity of TiO2 nanotubes (TNTs). A series of TNTs of varying tube diameter were synthesized by the anodization of titanium foils at different voltages, while vanadium oxide was deposited on TNTs by wet chemical deposition. An improvement in the optical properties of nanotubes was observed after the deposition of vanadium oxide. An improvement in the optical properties (redshift in UV-Vis spectra) of TNTs and TNT/VO was noted. The photocatalytic activity was improved with increasing tube diameter, while it was weakened after the deposition of VO. Furthermore, photoactivity was investigated in photodiodes based on TNTs or TNT/VO and single crystals of CH3NH3PbI3. The photoelectric measurement revealed that different TNT diameters did not influence the I-V characteristic of the photodiodes, while the deposition of VO improved the photocurrent for smaller TNTs.",
journal = "Catalysts, Catalysts",
title = "Effect of the Deposition of Vanadium-Oxide on the Photocatalytic Activity of TiO2 Nanotubes and Its Photodiode Performance Interfaced with CH3NH3PbI3 Single Crystal",
number = "2",
pages = "352",
volume = "13",
doi = "10.3390/catal13020352"
}

Vujančević, J., Andričević, P., Djokić, V., Blagojević, V., Pavlović, V. P., Ćirković, J., Horváth, E., Forró, L., Karoui, A., Pavlović, V. B.,& Janaćković, D.. (2023). Effect of the Deposition of Vanadium-Oxide on the Photocatalytic Activity of TiO2 Nanotubes and Its Photodiode Performance Interfaced with CH3NH3PbI3 Single Crystal. in Catalysts, 13(2), 352.
https://doi.org/10.3390/catal13020352

Vujančević J, Andričević P, Djokić V, Blagojević V, Pavlović VP, Ćirković J, Horváth E, Forró L, Karoui A, Pavlović VB, Janaćković D. Effect of the Deposition of Vanadium-Oxide on the Photocatalytic Activity of TiO2 Nanotubes and Its Photodiode Performance Interfaced with CH3NH3PbI3 Single Crystal. in Catalysts. 2023;13(2):352.
doi:10.3390/catal13020352 .

Vujančević, Jelena, Andričević, Pavao, Djokić, Veljko, Blagojević, Vladimir, Pavlović, Vera P., Ćirković, Jovana, Horváth, Endre, Forró, László, Karoui, Abdennaceur, Pavlović, Vladimir B., Janaćković, Djordje, "Effect of the Deposition of Vanadium-Oxide on the Photocatalytic Activity of TiO2 Nanotubes and Its Photodiode Performance Interfaced with CH3NH3PbI3 Single Crystal" in Catalysts, 13, no. 2 (2023):352,
https://doi.org/10.3390/catal13020352 . .

TY  - JOUR
AU  - Kosanović, Darko
AU  - Blagojević, Vladimir A.
AU  - Aleksić, Stanko O.
AU  - Živojinović, Jelena
AU  - Tadić, Adriana Peleš
AU  - Pavlović, Vladimir B.
AU  - Obradović, Nina
PY  - 2023
UR  - http://ojs.itn.sanu.ac.rs/index.php/scisint/article/view/1108
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6468
AB  - BZT ceramics was prepared by using fine powder mixture of BaCO3, TiO2 and ZrO2 in the respective molar ratio to form Ba(Zr0.10Ti0.90)O3 via solid state reaction at elevated temperature. The prepared BZT was milled in the planetary ball mill from 0-120 min to achieve different powder grades from micron to nano-sized particles. After the powder characterization by XRD and SEM the samples were pressed in disc shape and sintered at different temperatures from 1100-1350°C in the air. The sintered samples were characterized by SEM and their density and average grain size was determined and presented vs. sintering temperature and powder grades (milling time). After that the silver epoxy electrodes were deposited on sintered disc samples. The disc samples capacity and resistivity were measured at low frequency region from 1 Hz to 200 kHz using low frequency impedance analyzer. The sintering temperatures and powder grades were used as parameters. Finally the specific resistance ρ, dielectric constant (ε' + jε") and tgδ where determined from the impedance measurements. The behavior of electronic properties where analyzed e.g. the relaxation effect of the space charge (inter-granular electric charges) vs. sintering temperature and ceramic grades. The results obtained were compared with best literature data for the losses in BZT ceramics at low frequencies.
T2  - Science of Sintering
T2  - Science of Sintering
T1  - Electronic Properties of BZT Nano-Ceramic Grades at Low Frequency Region
IS  - 3
VL  - 55
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_6468
ER  - 

@article{
author = "Kosanović, Darko and Blagojević, Vladimir A. and Aleksić, Stanko O. and Živojinović, Jelena and Tadić, Adriana Peleš and Pavlović, Vladimir B. and Obradović, Nina",
year = "2023",
abstract = "BZT ceramics was prepared by using fine powder mixture of BaCO3, TiO2 and ZrO2 in the respective molar ratio to form Ba(Zr0.10Ti0.90)O3 via solid state reaction at elevated temperature. The prepared BZT was milled in the planetary ball mill from 0-120 min to achieve different powder grades from micron to nano-sized particles. After the powder characterization by XRD and SEM the samples were pressed in disc shape and sintered at different temperatures from 1100-1350°C in the air. The sintered samples were characterized by SEM and their density and average grain size was determined and presented vs. sintering temperature and powder grades (milling time). After that the silver epoxy electrodes were deposited on sintered disc samples. The disc samples capacity and resistivity were measured at low frequency region from 1 Hz to 200 kHz using low frequency impedance analyzer. The sintering temperatures and powder grades were used as parameters. Finally the specific resistance ρ, dielectric constant (ε' + jε") and tgδ where determined from the impedance measurements. The behavior of electronic properties where analyzed e.g. the relaxation effect of the space charge (inter-granular electric charges) vs. sintering temperature and ceramic grades. The results obtained were compared with best literature data for the losses in BZT ceramics at low frequencies.",
journal = "Science of Sintering, Science of Sintering",
title = "Electronic Properties of BZT Nano-Ceramic Grades at Low Frequency Region",
number = "3",
volume = "55",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_6468"
}

Kosanović, D., Blagojević, V. A., Aleksić, S. O., Živojinović, J., Tadić, A. P., Pavlović, V. B.,& Obradović, N.. (2023). Electronic Properties of BZT Nano-Ceramic Grades at Low Frequency Region. in Science of Sintering, 55(3).
https://hdl.handle.net/21.15107/rcub_agrospace_6468

Kosanović D, Blagojević VA, Aleksić SO, Živojinović J, Tadić AP, Pavlović VB, Obradović N. Electronic Properties of BZT Nano-Ceramic Grades at Low Frequency Region. in Science of Sintering. 2023;55(3).
https://hdl.handle.net/21.15107/rcub_agrospace_6468 .

Kosanović, Darko, Blagojević, Vladimir A., Aleksić, Stanko O., Živojinović, Jelena, Tadić, Adriana Peleš, Pavlović, Vladimir B., Obradović, Nina, "Electronic Properties of BZT Nano-Ceramic Grades at Low Frequency Region" in Science of Sintering, 55, no. 3 (2023),
https://hdl.handle.net/21.15107/rcub_agrospace_6468 .

TY  - JOUR
AU  - Stojanović, Srna Stojanović
AU  - Rac, Vladislav
AU  - Mojsilović, Kristina Mojsilović
AU  - Vasilić, Rastko
AU  - Marković, Smilja
AU  - Damjanović-Vasilić, Ljiljana
PY  - 2023
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6383
AB  - Photocatalytic degradation of bisphenol A (BPA) was investigated using commercial TiO2 P25 nanoparticles supported on natural zeolite clinoptilolite (Cli). Employing ultrasound assisted solid-state dispersion method hybrid photocatalyst containing 20 wt% of TiO2, marked TCli-20, was prepared. The structural, morphological and surface properties, and particle size distribution of TCli-20 were studied by X-ray powder diffraction, Fourier transform infrared spectroscopy, ultraviolet–visible diffuse reflectance spectroscopy, scanning electron microscopy with energy dispersive spectroscopy, atomic force microscopy, Brunner-Emmet-Teller method and laser diffraction. The results revealed a successful loading of TiO2 P25 nanoparticles on Cli surface and the preservation of both zeolitic structure and optical properties of TiO2. The influence of catalyst dose, pH value and the addition of hydrogen peroxide (H2O2) was evaluated. The optimal reaction conditions were 2 g/L of catalyst at near-neutral conditions (pH = 6.4) for complete BPA (5 mg/L) photodegradation after 180 min of exposure to simulated solar light. The addition of H2O2 was beneficial for the degradation process and led to the removal of BPA after 120 min of irradiation. BPA removal (60% for 180 min of irradiation) was reduced when TCli-20 was tested in bottled drinking water due to the presence of bicarbonate ions which acted as scavengers for hydroxyl radicals. Even though the photocatalytic activity of TCli-20 decreased after several cycles of usage, 70% of BPA was still successfully degraded during the fourth cycle. The reusability study showed easy separation, stability and good photocatalytic ability of investigated cost-effective hybrid photocatalyst. © 2023, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
T2  - Environmental Science and Pollution Research
T2  - Environmental Science and Pollution Research
T1  - Photocatalytic degradation of bisphenol A in aqueous solution using TiO2/clinoptilolite hybrid photocatalyst
DO  - 10.1007/s11356-023-28397-w
ER  - 

@article{
author = "Stojanović, Srna Stojanović and Rac, Vladislav and Mojsilović, Kristina Mojsilović and Vasilić, Rastko and Marković, Smilja and Damjanović-Vasilić, Ljiljana",
year = "2023",
abstract = "Photocatalytic degradation of bisphenol A (BPA) was investigated using commercial TiO2 P25 nanoparticles supported on natural zeolite clinoptilolite (Cli). Employing ultrasound assisted solid-state dispersion method hybrid photocatalyst containing 20 wt% of TiO2, marked TCli-20, was prepared. The structural, morphological and surface properties, and particle size distribution of TCli-20 were studied by X-ray powder diffraction, Fourier transform infrared spectroscopy, ultraviolet–visible diffuse reflectance spectroscopy, scanning electron microscopy with energy dispersive spectroscopy, atomic force microscopy, Brunner-Emmet-Teller method and laser diffraction. The results revealed a successful loading of TiO2 P25 nanoparticles on Cli surface and the preservation of both zeolitic structure and optical properties of TiO2. The influence of catalyst dose, pH value and the addition of hydrogen peroxide (H2O2) was evaluated. The optimal reaction conditions were 2 g/L of catalyst at near-neutral conditions (pH = 6.4) for complete BPA (5 mg/L) photodegradation after 180 min of exposure to simulated solar light. The addition of H2O2 was beneficial for the degradation process and led to the removal of BPA after 120 min of irradiation. BPA removal (60% for 180 min of irradiation) was reduced when TCli-20 was tested in bottled drinking water due to the presence of bicarbonate ions which acted as scavengers for hydroxyl radicals. Even though the photocatalytic activity of TCli-20 decreased after several cycles of usage, 70% of BPA was still successfully degraded during the fourth cycle. The reusability study showed easy separation, stability and good photocatalytic ability of investigated cost-effective hybrid photocatalyst. © 2023, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.",
journal = "Environmental Science and Pollution Research, Environmental Science and Pollution Research",
title = "Photocatalytic degradation of bisphenol A in aqueous solution using TiO2/clinoptilolite hybrid photocatalyst",
doi = "10.1007/s11356-023-28397-w"
}

Stojanović, S. S., Rac, V., Mojsilović, K. M., Vasilić, R., Marković, S.,& Damjanović-Vasilić, L.. (2023). Photocatalytic degradation of bisphenol A in aqueous solution using TiO2/clinoptilolite hybrid photocatalyst. in Environmental Science and Pollution Research.
https://doi.org/10.1007/s11356-023-28397-w

Stojanović SS, Rac V, Mojsilović KM, Vasilić R, Marković S, Damjanović-Vasilić L. Photocatalytic degradation of bisphenol A in aqueous solution using TiO2/clinoptilolite hybrid photocatalyst. in Environmental Science and Pollution Research. 2023;.
doi:10.1007/s11356-023-28397-w .

Stojanović, Srna Stojanović, Rac, Vladislav, Mojsilović, Kristina Mojsilović, Vasilić, Rastko, Marković, Smilja, Damjanović-Vasilić, Ljiljana, "Photocatalytic degradation of bisphenol A in aqueous solution using TiO2/clinoptilolite hybrid photocatalyst" in Environmental Science and Pollution Research (2023),
https://doi.org/10.1007/s11356-023-28397-w . .

TY  - JOUR
AU  - Aleksić, Katarina
AU  - Stojković Simatović, Ivana
AU  - Stanković, Ana
AU  - Veselinović, Ljiljana
AU  - Stojadinović, Stevan
AU  - Rac, Vladislav
AU  - Radmilović, Nadežda
AU  - Rajić, Vladimir
AU  - Škapin, Srečo Davor
AU  - Mančić, Lidija
AU  - Marković, Smilja
PY  - 2023
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6368
AB  - Catalytic materials are the greatest challenge for the commercial application of water electrolysis (WEs) and fuel cells (FCs) as clean energy technologies. There is a need to find an alternative to expensive and unavailable platinum group metal (PGM) catalysts. This study aimed to reduce the cost of PGM materials by replacing Ru with RuO2 and lowering the amount of RuO2 by adding abundant and multifunctional ZnO. A ZnO@RuO2 composite in a 10:1 molar ratio was synthesized by microwave processing of a precipitate as a green, low-cost, and fast method, and then annealed at 300°C and 600°C to improve the catalytic properties. The physicochemical properties of the ZnO@RuO2 composites were investigated by X-ray powder diffraction (XRD), Raman and Fourier transform infrared (FTIR) spectroscopy, field emission scanning electron microscopy (FESEM), UV-Vis diffuse reflectance spectroscopy (DRS), and photoluminescence (PL) spectroscopy. The electrochemical activity of the samples was investigated by linear sweep voltammetry in acidic and alkaline electrolytes. We observed good bifunctional catalytic activity of the ZnO@RuO2 composites toward HER and OER in both electrolytes. The improved bifunctional catalytic activity of the ZnO@RuO2 composite by annealing was discussed and attributed to the reduced number of bulk oxygen vacancies and the increased number of established heterojunctions. Copyright © 2023 Aleksić, Stojković Simatović, Stanković, Veselinović, Stojadinović, Rac, Radmilović, Rajić, Škapin, Mančić and Marković.
T2  - Frontiers in Chemistry
T2  - Frontiers in Chemistry
T1  - Enhancement of ZnO@RuO2 bifunctional photo-electro catalytic activity toward water splitting
VL  - 11
DO  - 10.3389/fchem.2023.1173910
ER  - 

@article{
author = "Aleksić, Katarina and Stojković Simatović, Ivana and Stanković, Ana and Veselinović, Ljiljana and Stojadinović, Stevan and Rac, Vladislav and Radmilović, Nadežda and Rajić, Vladimir and Škapin, Srečo Davor and Mančić, Lidija and Marković, Smilja",
year = "2023",
abstract = "Catalytic materials are the greatest challenge for the commercial application of water electrolysis (WEs) and fuel cells (FCs) as clean energy technologies. There is a need to find an alternative to expensive and unavailable platinum group metal (PGM) catalysts. This study aimed to reduce the cost of PGM materials by replacing Ru with RuO2 and lowering the amount of RuO2 by adding abundant and multifunctional ZnO. A ZnO@RuO2 composite in a 10:1 molar ratio was synthesized by microwave processing of a precipitate as a green, low-cost, and fast method, and then annealed at 300°C and 600°C to improve the catalytic properties. The physicochemical properties of the ZnO@RuO2 composites were investigated by X-ray powder diffraction (XRD), Raman and Fourier transform infrared (FTIR) spectroscopy, field emission scanning electron microscopy (FESEM), UV-Vis diffuse reflectance spectroscopy (DRS), and photoluminescence (PL) spectroscopy. The electrochemical activity of the samples was investigated by linear sweep voltammetry in acidic and alkaline electrolytes. We observed good bifunctional catalytic activity of the ZnO@RuO2 composites toward HER and OER in both electrolytes. The improved bifunctional catalytic activity of the ZnO@RuO2 composite by annealing was discussed and attributed to the reduced number of bulk oxygen vacancies and the increased number of established heterojunctions. Copyright © 2023 Aleksić, Stojković Simatović, Stanković, Veselinović, Stojadinović, Rac, Radmilović, Rajić, Škapin, Mančić and Marković.",
journal = "Frontiers in Chemistry, Frontiers in Chemistry",
title = "Enhancement of ZnO@RuO2 bifunctional photo-electro catalytic activity toward water splitting",
volume = "11",
doi = "10.3389/fchem.2023.1173910"
}

Aleksić, K., Stojković Simatović, I., Stanković, A., Veselinović, L., Stojadinović, S., Rac, V., Radmilović, N., Rajić, V., Škapin, S. D., Mančić, L.,& Marković, S.. (2023). Enhancement of ZnO@RuO2 bifunctional photo-electro catalytic activity toward water splitting. in Frontiers in Chemistry, 11.
https://doi.org/10.3389/fchem.2023.1173910

Aleksić K, Stojković Simatović I, Stanković A, Veselinović L, Stojadinović S, Rac V, Radmilović N, Rajić V, Škapin SD, Mančić L, Marković S. Enhancement of ZnO@RuO2 bifunctional photo-electro catalytic activity toward water splitting. in Frontiers in Chemistry. 2023;11.
doi:10.3389/fchem.2023.1173910 .

Aleksić, Katarina, Stojković Simatović, Ivana, Stanković, Ana, Veselinović, Ljiljana, Stojadinović, Stevan, Rac, Vladislav, Radmilović, Nadežda, Rajić, Vladimir, Škapin, Srečo Davor, Mančić, Lidija, Marković, Smilja, "Enhancement of ZnO@RuO2 bifunctional photo-electro catalytic activity toward water splitting" in Frontiers in Chemistry, 11 (2023),
https://doi.org/10.3389/fchem.2023.1173910 . .

TY  - JOUR
AU  - Janićijević, Aleksandra
AU  - Pavlović, Vera P.
AU  - Kovačević, Danijela
AU  - Perić, Marko
AU  - Vlahović, Branislav
AU  - Pavlović, Vladimir
AU  - Filipović, Suzana
PY  - 2022
UR  - https://www.mdpi.com/2073-4360/14/9/1819
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6095
AB  - The rise of innovation in the electrical industry is driven by the controlled design of new materials. The hybrid materials based on magnetite/nanocellulose are highly interesting due to their various applications in medicine, ecology, catalysis and electronics. In this study, the structure and morphology of nanocellulose/magnetite hybrid nanomaterials were investigated. The effect of nanocellulose loading on the crystal structure of synthesized composites was investigated by XRD and FTIR methods. The presented study reveals that the interaction between the cellulose and magnetic nanoparticles depends on the nanocellulose content. Further, a transition from cellulose II to cellulose I allomorph is observed. SEM and EDS are employed to determine the variation in morphology with changes in component concentrations. By the calculation of magnetic interactions between adjacent Fe3+ and Fe2+ ions within composites, it is determined that ferromagnetic coupling predominates.
T2  - Polymers
T2  - Polymers
T1  - Structural Characterization of Nanocellulose/Fe3O4 Hybrid Nanomaterials
IS  - 9
SP  - 1819
VL  - 14
DO  - 10.3390/polym14091819
ER  - 

@article{
author = "Janićijević, Aleksandra and Pavlović, Vera P. and Kovačević, Danijela and Perić, Marko and Vlahović, Branislav and Pavlović, Vladimir and Filipović, Suzana",
year = "2022",
abstract = "The rise of innovation in the electrical industry is driven by the controlled design of new materials. The hybrid materials based on magnetite/nanocellulose are highly interesting due to their various applications in medicine, ecology, catalysis and electronics. In this study, the structure and morphology of nanocellulose/magnetite hybrid nanomaterials were investigated. The effect of nanocellulose loading on the crystal structure of synthesized composites was investigated by XRD and FTIR methods. The presented study reveals that the interaction between the cellulose and magnetic nanoparticles depends on the nanocellulose content. Further, a transition from cellulose II to cellulose I allomorph is observed. SEM and EDS are employed to determine the variation in morphology with changes in component concentrations. By the calculation of magnetic interactions between adjacent Fe3+ and Fe2+ ions within composites, it is determined that ferromagnetic coupling predominates.",
journal = "Polymers, Polymers",
title = "Structural Characterization of Nanocellulose/Fe3O4 Hybrid Nanomaterials",
number = "9",
pages = "1819",
volume = "14",
doi = "10.3390/polym14091819"
}

Janićijević, A., Pavlović, V. P., Kovačević, D., Perić, M., Vlahović, B., Pavlović, V.,& Filipović, S.. (2022). Structural Characterization of Nanocellulose/Fe3O4 Hybrid Nanomaterials. in Polymers, 14(9), 1819.
https://doi.org/10.3390/polym14091819

Janićijević A, Pavlović VP, Kovačević D, Perić M, Vlahović B, Pavlović V, Filipović S. Structural Characterization of Nanocellulose/Fe3O4 Hybrid Nanomaterials. in Polymers. 2022;14(9):1819.
doi:10.3390/polym14091819 .

Janićijević, Aleksandra, Pavlović, Vera P., Kovačević, Danijela, Perić, Marko, Vlahović, Branislav, Pavlović, Vladimir, Filipović, Suzana, "Structural Characterization of Nanocellulose/Fe3O4 Hybrid Nanomaterials" in Polymers, 14, no. 9 (2022):1819,
https://doi.org/10.3390/polym14091819 . .

TY  - JOUR
AU  - Mirković, Miljana
AU  - Filipović, Suzana
AU  - Kalijadis, Ana
AU  - Mašković, Pavle
AU  - Mašković, Jelena
AU  - Vlahović, Branislav
AU  - Pavlović, Vladimir
PY  - 2022
UR  - https://www.mdpi.com/2079-6382/11/5/592
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6096
AB  - Due to the growing number of people infected with the new coronavirus globally, which weakens immunity, there has been an increase in bacterial infections. Hence, knowledge about simple and low-cost synthesis methods of materials with good structural and antimicrobial properties is of great importance. A material obtained through the combination of a nanoscale hydroxyapatite material (with good biocompatibility) and titanium dioxide (with good degradation properties of organic molecules) can absorb and decompose bacteria. In this investigation, three different synthesis routes used to prepare hydroxyapatite/titanium dioxide nanomaterials are examined. The morphology and semiquantitative chemical composition are characterized by scanning electron microscopy with energy dispersive X-ray analysis (SEM-EDX). The obtained materials’ phase and structural characterization are determined using the X-ray powder diffraction method (XRD). The crystallite sizes of the obtained materials are in the range of 8 nm to 15 nm. Based on XRD peak positions, the hexagonal hydroxyapatite phases are formed in all samples along with TiO2 anatase and rutile phases. According to SEM and TEM analyses, the morphology of the prepared samples differs depending on the synthesis route. The EDX analysis confirmed the presence of Ti, Ca, P, and O in the obtained materials. The IR spectroscopy verified the vibration bands characteristic for HAp and titanium. The investigated materials show excellent antimicrobial and photocatalytic properties.
T2  - Antibiotics
T2  - Antibiotics
T1  - Hydroxyapatite/TiO2 Nanomaterial with Defined Microstructural and Good Antimicrobial Properties
IS  - 5
SP  - 592
VL  - 11
DO  - 10.3390/antibiotics11050592
ER  - 

@article{
author = "Mirković, Miljana and Filipović, Suzana and Kalijadis, Ana and Mašković, Pavle and Mašković, Jelena and Vlahović, Branislav and Pavlović, Vladimir",
year = "2022",
abstract = "Due to the growing number of people infected with the new coronavirus globally, which weakens immunity, there has been an increase in bacterial infections. Hence, knowledge about simple and low-cost synthesis methods of materials with good structural and antimicrobial properties is of great importance. A material obtained through the combination of a nanoscale hydroxyapatite material (with good biocompatibility) and titanium dioxide (with good degradation properties of organic molecules) can absorb and decompose bacteria. In this investigation, three different synthesis routes used to prepare hydroxyapatite/titanium dioxide nanomaterials are examined. The morphology and semiquantitative chemical composition are characterized by scanning electron microscopy with energy dispersive X-ray analysis (SEM-EDX). The obtained materials’ phase and structural characterization are determined using the X-ray powder diffraction method (XRD). The crystallite sizes of the obtained materials are in the range of 8 nm to 15 nm. Based on XRD peak positions, the hexagonal hydroxyapatite phases are formed in all samples along with TiO2 anatase and rutile phases. According to SEM and TEM analyses, the morphology of the prepared samples differs depending on the synthesis route. The EDX analysis confirmed the presence of Ti, Ca, P, and O in the obtained materials. The IR spectroscopy verified the vibration bands characteristic for HAp and titanium. The investigated materials show excellent antimicrobial and photocatalytic properties.",
journal = "Antibiotics, Antibiotics",
title = "Hydroxyapatite/TiO2 Nanomaterial with Defined Microstructural and Good Antimicrobial Properties",
number = "5",
pages = "592",
volume = "11",
doi = "10.3390/antibiotics11050592"
}

Mirković, M., Filipović, S., Kalijadis, A., Mašković, P., Mašković, J., Vlahović, B.,& Pavlović, V.. (2022). Hydroxyapatite/TiO2 Nanomaterial with Defined Microstructural and Good Antimicrobial Properties. in Antibiotics, 11(5), 592.
https://doi.org/10.3390/antibiotics11050592

Mirković M, Filipović S, Kalijadis A, Mašković P, Mašković J, Vlahović B, Pavlović V. Hydroxyapatite/TiO2 Nanomaterial with Defined Microstructural and Good Antimicrobial Properties. in Antibiotics. 2022;11(5):592.
doi:10.3390/antibiotics11050592 .

Mirković, Miljana, Filipović, Suzana, Kalijadis, Ana, Mašković, Pavle, Mašković, Jelena, Vlahović, Branislav, Pavlović, Vladimir, "Hydroxyapatite/TiO2 Nanomaterial with Defined Microstructural and Good Antimicrobial Properties" in Antibiotics, 11, no. 5 (2022):592,
https://doi.org/10.3390/antibiotics11050592 . .

TY  - JOUR
AU  - Vujančević, Jelena
AU  - Bjelajac, Anđelika
AU  - Veltruska, Katerina
AU  - Matolin, Vladimir
AU  - Siketić, Zdravko
AU  - Provatas, Georgios
AU  - Jakšić, Milko
AU  - Stan, George E.
AU  - Socol, Gabriel
AU  - Mihailescu, Ion N.
AU  - Pavlović, Vladimir B.
AU  - Janaćković, Đorđe
PY  - 2022
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6115
AB  - Pure Ti films deposited by radio-frequency magnetron sputtering on FTO glass were anodized to fabricate TiO2 nanotubes (NTs) arrays. The TiO2 NTs/FTO samples were sintered at 450, 550 and 630o C, in ambient air. The thermal treatment did not influence the crystal phase composition, preserving in all cases the anatase single phase. As expected, the crystalline anatase quality improved with the annealing temperature. Nevertheless, slight differences in nanotubular morphology, such as the appearance of grains inside the walls, were observed in the case of the sample sintered at 630o C. Chemical analysis by X-ray Photoelectron Spectroscopy of annealed samples revealed the presence of Sn inside TiO2 NTs, due to diffusion of Sn from the substrate to TiO2. For the substrate was used FTO glass whose top layer consists of SnO2 doped with F. Rutherford Backscattering Spectrometry and Time-of-Flight Elastic Recoil Detection Analysis were carried out to study the elemental depth profile of the films. It was found that the temperature of sintering controls the Sn diffusion inside TiO2 film. Sn atoms diffuse towards the TiO2 NTs surface for the samples annealed at 450 and 550oC. The diffusion is however hindered in the case of the heat treatment at 630o C. Besides, the Ti diffusion into the SnO2 underlayer was observed, together with the formation of TiO2/SnO2 interfaces. One then expected but not a great difference in absorption between samples, since all contained anatase phase, as confirmed by Diffuse Reflectance Spectroscopy. A higher amount of Sn was however detected for the sample annealed at 550o C, which accounts for a slight red absorption shift. The importance of controlling the annealing parameters of the anodized TiO2/FTO structures was highlighted through the formation of TiO2-SnO2 interfaces and the Sn insertion from FTO, which can play an essential role in increasing the photoperformances of TiO2 NTs/FTO based structures of photovoltaic cells. © 2022 Authors. Published by association for ETRAN Society.
T2  - Science of Sintering
T2  - Science of Sintering
T1  - TiO2 Nanotubes Film/FTO Glass Interface: Thermal Treatment Effects
EP  - 248
IS  - 2
SP  - 235
VL  - 54
DO  - 10.2298/SOS2202235V
ER  - 

@article{
author = "Vujančević, Jelena and Bjelajac, Anđelika and Veltruska, Katerina and Matolin, Vladimir and Siketić, Zdravko and Provatas, Georgios and Jakšić, Milko and Stan, George E. and Socol, Gabriel and Mihailescu, Ion N. and Pavlović, Vladimir B. and Janaćković, Đorđe",
year = "2022",
abstract = "Pure Ti films deposited by radio-frequency magnetron sputtering on FTO glass were anodized to fabricate TiO2 nanotubes (NTs) arrays. The TiO2 NTs/FTO samples were sintered at 450, 550 and 630o C, in ambient air. The thermal treatment did not influence the crystal phase composition, preserving in all cases the anatase single phase. As expected, the crystalline anatase quality improved with the annealing temperature. Nevertheless, slight differences in nanotubular morphology, such as the appearance of grains inside the walls, were observed in the case of the sample sintered at 630o C. Chemical analysis by X-ray Photoelectron Spectroscopy of annealed samples revealed the presence of Sn inside TiO2 NTs, due to diffusion of Sn from the substrate to TiO2. For the substrate was used FTO glass whose top layer consists of SnO2 doped with F. Rutherford Backscattering Spectrometry and Time-of-Flight Elastic Recoil Detection Analysis were carried out to study the elemental depth profile of the films. It was found that the temperature of sintering controls the Sn diffusion inside TiO2 film. Sn atoms diffuse towards the TiO2 NTs surface for the samples annealed at 450 and 550oC. The diffusion is however hindered in the case of the heat treatment at 630o C. Besides, the Ti diffusion into the SnO2 underlayer was observed, together with the formation of TiO2/SnO2 interfaces. One then expected but not a great difference in absorption between samples, since all contained anatase phase, as confirmed by Diffuse Reflectance Spectroscopy. A higher amount of Sn was however detected for the sample annealed at 550o C, which accounts for a slight red absorption shift. The importance of controlling the annealing parameters of the anodized TiO2/FTO structures was highlighted through the formation of TiO2-SnO2 interfaces and the Sn insertion from FTO, which can play an essential role in increasing the photoperformances of TiO2 NTs/FTO based structures of photovoltaic cells. © 2022 Authors. Published by association for ETRAN Society.",
journal = "Science of Sintering, Science of Sintering",
title = "TiO2 Nanotubes Film/FTO Glass Interface: Thermal Treatment Effects",
pages = "248-235",
number = "2",
volume = "54",
doi = "10.2298/SOS2202235V"
}

Vujančević, J., Bjelajac, A., Veltruska, K., Matolin, V., Siketić, Z., Provatas, G., Jakšić, M., Stan, G. E., Socol, G., Mihailescu, I. N., Pavlović, V. B.,& Janaćković, Đ.. (2022). TiO2 Nanotubes Film/FTO Glass Interface: Thermal Treatment Effects. in Science of Sintering, 54(2), 235-248.
https://doi.org/10.2298/SOS2202235V

Vujančević J, Bjelajac A, Veltruska K, Matolin V, Siketić Z, Provatas G, Jakšić M, Stan GE, Socol G, Mihailescu IN, Pavlović VB, Janaćković Đ. TiO2 Nanotubes Film/FTO Glass Interface: Thermal Treatment Effects. in Science of Sintering. 2022;54(2):235-248.
doi:10.2298/SOS2202235V .

Vujančević, Jelena, Bjelajac, Anđelika, Veltruska, Katerina, Matolin, Vladimir, Siketić, Zdravko, Provatas, Georgios, Jakšić, Milko, Stan, George E., Socol, Gabriel, Mihailescu, Ion N., Pavlović, Vladimir B., Janaćković, Đorđe, "TiO2 Nanotubes Film/FTO Glass Interface: Thermal Treatment Effects" in Science of Sintering, 54, no. 2 (2022):235-248,
https://doi.org/10.2298/SOS2202235V . .

TY  - JOUR
AU  - Peleš Tadić, Adriana
AU  - Blagojević, Vladimir A.
AU  - Stojanović, Dušica
AU  - Ostojić, Sanja B.
AU  - Tasić, Nikola
AU  - Kosanović, Darko
AU  - Uskoković, Petar
AU  - Pavlović, Vladimir B.
PY  - 2022
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6219
AB  - Poly(vinylidenefluoride)–ZnO (PVDF–ZnO) nanocomposites with mechanically activated ZnO nanoparticle fillers were investigated using thermal and mechanical analysis and AFM and PFM. Differential scanning calorimetry (DSC) investigated the effect of ZnO nanoparticles on the crystallinity of the polymer, under controlled heating and cooling. Atomic force (AFM) microscopy was used to record the surfaces of the samples. Nanocomposite surface roughness shows the presence of the different phases inside of the matrix, where rough samples contain a higher proportion of the β phase. PFM was performed to investigate the piezoresponse of the composites. Nanoidentation showed that the mechanical activation of the filler (ZnO) increases the Young modulus with the activation time. Molecular simulations in periodic systems (PVDF–ZnO spherical nanocluster and nanocylinder composite) were used to investigate the influence of particle size and shape on the Young modulus of different phases of PVDF. © 2022
T2  - Materials Science and Engineering B: Solid-State Materials for Advanced Technology
T2  - Materials Science and Engineering B: Solid-State Materials for Advanced Technology
T1  - Nanomechanical properties of PVDF–ZnO polymer nanocomposite
VL  - 287
DO  - 10.1016/j.mseb.2022.116126
ER  - 

@article{
author = "Peleš Tadić, Adriana and Blagojević, Vladimir A. and Stojanović, Dušica and Ostojić, Sanja B. and Tasić, Nikola and Kosanović, Darko and Uskoković, Petar and Pavlović, Vladimir B.",
year = "2022",
abstract = "Poly(vinylidenefluoride)–ZnO (PVDF–ZnO) nanocomposites with mechanically activated ZnO nanoparticle fillers were investigated using thermal and mechanical analysis and AFM and PFM. Differential scanning calorimetry (DSC) investigated the effect of ZnO nanoparticles on the crystallinity of the polymer, under controlled heating and cooling. Atomic force (AFM) microscopy was used to record the surfaces of the samples. Nanocomposite surface roughness shows the presence of the different phases inside of the matrix, where rough samples contain a higher proportion of the β phase. PFM was performed to investigate the piezoresponse of the composites. Nanoidentation showed that the mechanical activation of the filler (ZnO) increases the Young modulus with the activation time. Molecular simulations in periodic systems (PVDF–ZnO spherical nanocluster and nanocylinder composite) were used to investigate the influence of particle size and shape on the Young modulus of different phases of PVDF. © 2022",
journal = "Materials Science and Engineering B: Solid-State Materials for Advanced Technology, Materials Science and Engineering B: Solid-State Materials for Advanced Technology",
title = "Nanomechanical properties of PVDF–ZnO polymer nanocomposite",
volume = "287",
doi = "10.1016/j.mseb.2022.116126"
}

Peleš Tadić, A., Blagojević, V. A., Stojanović, D., Ostojić, S. B., Tasić, N., Kosanović, D., Uskoković, P.,& Pavlović, V. B.. (2022). Nanomechanical properties of PVDF–ZnO polymer nanocomposite. in Materials Science and Engineering B: Solid-State Materials for Advanced Technology, 287.
https://doi.org/10.1016/j.mseb.2022.116126

Peleš Tadić A, Blagojević VA, Stojanović D, Ostojić SB, Tasić N, Kosanović D, Uskoković P, Pavlović VB. Nanomechanical properties of PVDF–ZnO polymer nanocomposite. in Materials Science and Engineering B: Solid-State Materials for Advanced Technology. 2022;287.
doi:10.1016/j.mseb.2022.116126 .

Peleš Tadić, Adriana, Blagojević, Vladimir A., Stojanović, Dušica, Ostojić, Sanja B., Tasić, Nikola, Kosanović, Darko, Uskoković, Petar, Pavlović, Vladimir B., "Nanomechanical properties of PVDF–ZnO polymer nanocomposite" in Materials Science and Engineering B: Solid-State Materials for Advanced Technology, 287 (2022),
https://doi.org/10.1016/j.mseb.2022.116126 . .

TY  - JOUR
AU  - Živojinović, Jelena
AU  - Kosanović, Darko
AU  - Blagojević, Vladimir A.
AU  - Pavlović, Vera P.
AU  - Tadić, Nenad
AU  - Vlahović, Branislav
AU  - Pavlović, Vladimir B.
PY  - 2022
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6243
AB  - In this study, microstructure evolution and dielectric properties of SrTiO3 ceramic have been investigated, whereby mechanical activation of SrTiO3 powders was used to modify the functional properties of ceramic materials. Microstructural SEM analysis of SrTiO3 ceramics showed that the increase in mechanical activation time results in less porous samples. Raman spectroscopy indicated changes in the broadening and asymmetry of the TO2 mode with a change in the time of mechanical activation. TO2 mode showed a Fano asymmetry due to its interaction with polarization fluctuations in polar micro-regions, which are a consequence of the presence of oxygen vacancies caused by activation. The maximum value of dielectric permittivity was observed in the sample activated for 10 min. Also, the sample activated for 10 min exhibits relatively low values of loss tangent, compared to the other mechanically activated samples, providing the best overall dielectric performance compared to other samples. © 2022 Authors. Published by association for ETRAN Society.
T2  - Science of Sintering
T2  - Science of Sintering
T1  - Dielectric Properties of Mechanically Activated Strontium Titanate Ceramics
EP  - 404
IS  - 4
SP  - 401
VL  - 54
DO  - 10.2298/SOS2204401Z
ER  - 

@article{
author = "Živojinović, Jelena and Kosanović, Darko and Blagojević, Vladimir A. and Pavlović, Vera P. and Tadić, Nenad and Vlahović, Branislav and Pavlović, Vladimir B.",
year = "2022",
abstract = "In this study, microstructure evolution and dielectric properties of SrTiO3 ceramic have been investigated, whereby mechanical activation of SrTiO3 powders was used to modify the functional properties of ceramic materials. Microstructural SEM analysis of SrTiO3 ceramics showed that the increase in mechanical activation time results in less porous samples. Raman spectroscopy indicated changes in the broadening and asymmetry of the TO2 mode with a change in the time of mechanical activation. TO2 mode showed a Fano asymmetry due to its interaction with polarization fluctuations in polar micro-regions, which are a consequence of the presence of oxygen vacancies caused by activation. The maximum value of dielectric permittivity was observed in the sample activated for 10 min. Also, the sample activated for 10 min exhibits relatively low values of loss tangent, compared to the other mechanically activated samples, providing the best overall dielectric performance compared to other samples. © 2022 Authors. Published by association for ETRAN Society.",
journal = "Science of Sintering, Science of Sintering",
title = "Dielectric Properties of Mechanically Activated Strontium Titanate Ceramics",
pages = "404-401",
number = "4",
volume = "54",
doi = "10.2298/SOS2204401Z"
}

Živojinović, J., Kosanović, D., Blagojević, V. A., Pavlović, V. P., Tadić, N., Vlahović, B.,& Pavlović, V. B.. (2022). Dielectric Properties of Mechanically Activated Strontium Titanate Ceramics. in Science of Sintering, 54(4), 401-404.
https://doi.org/10.2298/SOS2204401Z

Živojinović J, Kosanović D, Blagojević VA, Pavlović VP, Tadić N, Vlahović B, Pavlović VB. Dielectric Properties of Mechanically Activated Strontium Titanate Ceramics. in Science of Sintering. 2022;54(4):401-404.
doi:10.2298/SOS2204401Z .

Živojinović, Jelena, Kosanović, Darko, Blagojević, Vladimir A., Pavlović, Vera P., Tadić, Nenad, Vlahović, Branislav, Pavlović, Vladimir B., "Dielectric Properties of Mechanically Activated Strontium Titanate Ceramics" in Science of Sintering, 54, no. 4 (2022):401-404,
https://doi.org/10.2298/SOS2204401Z . .

TY  - JOUR
AU  - Nikolić, Maria Vesna
AU  - Labus, Nebojša J.
AU  - Pavlović, Vera P.
AU  - Marković, Smilja
AU  - Luković, Miloljub D.
AU  - Tadić, Nenad B.
AU  - Vujančević, Jelena D.
AU  - Vlahović, Branislav
AU  - Pavlović, Vladimir
PY  - 2021
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5811
AB  - Nanocrystalline Zn2SnO4/SnO2 powder was obtained by a solid state reaction of ZnO and SnO2 nanopowders mixed in the molar ratio 1:1. The phase composition of the obtained powder was studied by XRD and Raman spectroscopy, morphology and texture were characterized by FESEM, TEM, BET and Hg porosimetry, while XPS and FTIR spectroscopy were used to determine the surface chemistry. The influence of humidity on complex impedance was monitored on bulk samples in the relative humidity (RH) range 30–90% in a climatic chamber in the frequency range 42 Hz- 1 MHz at working temperatures of 25 and 50 °C. Change in RH had a significant influence on impedance reduction, especially noticeable in the lower frequency range, indicating potential application of this nanocomposite as a humidity sensing material. Increase in RH led to an increase in AC conductivity that changed with frequency according to the Jonscher power law. The frequency exponent decreased with increase in RH and sample temperature indicating that the correlated hopping barrier model is the dominant conduction mechanism. Complex impedance was analyzed using an equivalent circuit consisting of a parallel resistance and constant phase element, showing the dominant influence of grain boundaries at both working temperatures (25 and 50 °C). The resistance decreased, while the capacitance and relaxation frequency increased with increase in RH. At high humidity an added Wartburg element enabled modeling of the charge diffusion process
PB  - Springer
T2  - Journal of Electroceramics
T1  - Nanocrystalline Zn2SnO4/SnO2: Crystal structure and humidity influence on complex impedance
DO  - 10.1007/s10832-021-00232-z
ER  - 

@article{
author = "Nikolić, Maria Vesna and Labus, Nebojša J. and Pavlović, Vera P. and Marković, Smilja and Luković, Miloljub D. and Tadić, Nenad B. and Vujančević, Jelena D. and Vlahović, Branislav and Pavlović, Vladimir",
year = "2021",
abstract = "Nanocrystalline Zn2SnO4/SnO2 powder was obtained by a solid state reaction of ZnO and SnO2 nanopowders mixed in the molar ratio 1:1. The phase composition of the obtained powder was studied by XRD and Raman spectroscopy, morphology and texture were characterized by FESEM, TEM, BET and Hg porosimetry, while XPS and FTIR spectroscopy were used to determine the surface chemistry. The influence of humidity on complex impedance was monitored on bulk samples in the relative humidity (RH) range 30–90% in a climatic chamber in the frequency range 42 Hz- 1 MHz at working temperatures of 25 and 50 °C. Change in RH had a significant influence on impedance reduction, especially noticeable in the lower frequency range, indicating potential application of this nanocomposite as a humidity sensing material. Increase in RH led to an increase in AC conductivity that changed with frequency according to the Jonscher power law. The frequency exponent decreased with increase in RH and sample temperature indicating that the correlated hopping barrier model is the dominant conduction mechanism. Complex impedance was analyzed using an equivalent circuit consisting of a parallel resistance and constant phase element, showing the dominant influence of grain boundaries at both working temperatures (25 and 50 °C). The resistance decreased, while the capacitance and relaxation frequency increased with increase in RH. At high humidity an added Wartburg element enabled modeling of the charge diffusion process",
publisher = "Springer",
journal = "Journal of Electroceramics",
title = "Nanocrystalline Zn2SnO4/SnO2: Crystal structure and humidity influence on complex impedance",
doi = "10.1007/s10832-021-00232-z"
}

Nikolić, M. V., Labus, N. J., Pavlović, V. P., Marković, S., Luković, M. D., Tadić, N. B., Vujančević, J. D., Vlahović, B.,& Pavlović, V.. (2021). Nanocrystalline Zn2SnO4/SnO2: Crystal structure and humidity influence on complex impedance. in Journal of Electroceramics
Springer..
https://doi.org/10.1007/s10832-021-00232-z

Nikolić MV, Labus NJ, Pavlović VP, Marković S, Luković MD, Tadić NB, Vujančević JD, Vlahović B, Pavlović V. Nanocrystalline Zn2SnO4/SnO2: Crystal structure and humidity influence on complex impedance. in Journal of Electroceramics. 2021;.
doi:10.1007/s10832-021-00232-z .

Nikolić, Maria Vesna, Labus, Nebojša J., Pavlović, Vera P., Marković, Smilja, Luković, Miloljub D., Tadić, Nenad B., Vujančević, Jelena D., Vlahović, Branislav, Pavlović, Vladimir, "Nanocrystalline Zn2SnO4/SnO2: Crystal structure and humidity influence on complex impedance" in Journal of Electroceramics (2021),
https://doi.org/10.1007/s10832-021-00232-z . .

TY  - JOUR
AU  - Ristić, Predrag
AU  - Filipović, Nenad
AU  - Blagojević, Vladimir
AU  - Ćirković, Jovana
AU  - Barta Holló, Berta
AU  - Đokić, Veljko R.
AU  - Donnard, Morgan
AU  - Gulea, Mihaela
AU  - Marjanović, Ivana
AU  - Klisurić, Olivera R.
AU  - Todorović, Tamara R.
PY  - 2021
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5898
AB  - Four silver-based coordination polymers, {[Ag(L1)2]NO3}∞(1), {[Ag(L1)2]ClO4}∞(2), {[Ag(L2)2]NO3·H2O}∞(3) and {[Ag(L2)2]ClO4}∞(4), were synthesized using the thiomorpholine-4-carbonitrile (L1) and piperazine-1,4-dicarbonitrile (L2) ligands. Compounds1and2are two-dimensional, while3and4are three-dimensional. L1 and L2 are 1,4-bis-monodentate ligands in all compounds, while Ag(i) ions are four-coordinated in a slightly distorted tetrahedral geometry. Topological analysis in standard representations suggests that underlying nets in1and2have ansqltopology, while3and4exhibit adiatopology. Thermal analysis shows that3loses crystalline water at room temperature, while other compounds show good thermal stability. All compounds show good photocatalytic activity for photocatalytic degradation of the mordant blue 9 dye, with reaction rates in the range 0.029 to 0.061 min−1. The best result was obtained for compound4, which can be correlated to its largest lattice volume.
PB  - Royal Society of Chemistry
T2  - CrystEngComm
T1  - 2D and 3D silver-based coordination polymers with thiomorpholine-4-carbonitrile and piperazine-1,4-dicarbonitrile: structure, intermolecular interactions, photocatalysis, and thermal behavior
EP  - 4815
IS  - 27
SP  - 4799
VL  - 23
DO  - 10.1039/d1ce00394a
ER  - 

@article{
author = "Ristić, Predrag and Filipović, Nenad and Blagojević, Vladimir and Ćirković, Jovana and Barta Holló, Berta and Đokić, Veljko R. and Donnard, Morgan and Gulea, Mihaela and Marjanović, Ivana and Klisurić, Olivera R. and Todorović, Tamara R.",
year = "2021",
abstract = "Four silver-based coordination polymers, {[Ag(L1)2]NO3}∞(1), {[Ag(L1)2]ClO4}∞(2), {[Ag(L2)2]NO3·H2O}∞(3) and {[Ag(L2)2]ClO4}∞(4), were synthesized using the thiomorpholine-4-carbonitrile (L1) and piperazine-1,4-dicarbonitrile (L2) ligands. Compounds1and2are two-dimensional, while3and4are three-dimensional. L1 and L2 are 1,4-bis-monodentate ligands in all compounds, while Ag(i) ions are four-coordinated in a slightly distorted tetrahedral geometry. Topological analysis in standard representations suggests that underlying nets in1and2have ansqltopology, while3and4exhibit adiatopology. Thermal analysis shows that3loses crystalline water at room temperature, while other compounds show good thermal stability. All compounds show good photocatalytic activity for photocatalytic degradation of the mordant blue 9 dye, with reaction rates in the range 0.029 to 0.061 min−1. The best result was obtained for compound4, which can be correlated to its largest lattice volume.",
publisher = "Royal Society of Chemistry",
journal = "CrystEngComm",
title = "2D and 3D silver-based coordination polymers with thiomorpholine-4-carbonitrile and piperazine-1,4-dicarbonitrile: structure, intermolecular interactions, photocatalysis, and thermal behavior",
pages = "4815-4799",
number = "27",
volume = "23",
doi = "10.1039/d1ce00394a"
}

Ristić, P., Filipović, N., Blagojević, V., Ćirković, J., Barta Holló, B., Đokić, V. R., Donnard, M., Gulea, M., Marjanović, I., Klisurić, O. R.,& Todorović, T. R.. (2021). 2D and 3D silver-based coordination polymers with thiomorpholine-4-carbonitrile and piperazine-1,4-dicarbonitrile: structure, intermolecular interactions, photocatalysis, and thermal behavior. in CrystEngComm
Royal Society of Chemistry., 23(27), 4799-4815.
https://doi.org/10.1039/d1ce00394a

Ristić P, Filipović N, Blagojević V, Ćirković J, Barta Holló B, Đokić VR, Donnard M, Gulea M, Marjanović I, Klisurić OR, Todorović TR. 2D and 3D silver-based coordination polymers with thiomorpholine-4-carbonitrile and piperazine-1,4-dicarbonitrile: structure, intermolecular interactions, photocatalysis, and thermal behavior. in CrystEngComm. 2021;23(27):4799-4815.
doi:10.1039/d1ce00394a .

Ristić, Predrag, Filipović, Nenad, Blagojević, Vladimir, Ćirković, Jovana, Barta Holló, Berta, Đokić, Veljko R., Donnard, Morgan, Gulea, Mihaela, Marjanović, Ivana, Klisurić, Olivera R., Todorović, Tamara R., "2D and 3D silver-based coordination polymers with thiomorpholine-4-carbonitrile and piperazine-1,4-dicarbonitrile: structure, intermolecular interactions, photocatalysis, and thermal behavior" in CrystEngComm, 23, no. 27 (2021):4799-4815,
https://doi.org/10.1039/d1ce00394a . .

TY  - JOUR
AU  - Filipović, S.
AU  - Obradović, N.
AU  - Andjelković, Lj.
AU  - Olćan, D.
AU  - Petrović, J.
AU  - Mirković, M.
AU  - Pavlović, V.
AU  - Jeremić, D.
AU  - Vlahović, B.
AU  - Đorđević, A.
PY  - 2021
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5835
AB  - Solid-state reaction between BaTiO3and Fe2O3was used to produce a multiferroic heterostructure composite. Commercial BaTiO3and Fe(NO3)3•9H2O were suspended in ethanol for 30 minutes in an ultrasound bath. The prepared mixture was thermally processed at 300°C for 6 h. Sintering at 1300 °C for 1 h resulted in a mixture of different phases, BaTiO3, BaFe12O19and Ba12Ti28Fe15O84, which were confirmed by x-ray powder diffraction. A dense microstructure with a small volume fraction of closed porosity was indicated by the scanning electron microscopy, while a homogeneous distribution of Fe ions over BaTiO3phase was visible from energy dispersive spectroscopy mapping. Doping of BaTiO3with Fe2O3resulted in formation of magnetic hexaferrite phases, as confirmed by dielectric measurements that showed a broadened maximum of the permittivity measured as a function of temperature.
PB  - International Institute for the Science of Sintering (IISS)
T2  - Science of Sintering
T1  - Multiferroic heterostructure BaTiO3/ε-Fe2O3composite obtained by in situ reaction
EP  - 8
IS  - 1
SP  - 1
VL  - 53
DO  - 10.2298/SOS2101001F
ER  - 

@article{
author = "Filipović, S. and Obradović, N. and Andjelković, Lj. and Olćan, D. and Petrović, J. and Mirković, M. and Pavlović, V. and Jeremić, D. and Vlahović, B. and Đorđević, A.",
year = "2021",
abstract = "Solid-state reaction between BaTiO3and Fe2O3was used to produce a multiferroic heterostructure composite. Commercial BaTiO3and Fe(NO3)3•9H2O were suspended in ethanol for 30 minutes in an ultrasound bath. The prepared mixture was thermally processed at 300°C for 6 h. Sintering at 1300 °C for 1 h resulted in a mixture of different phases, BaTiO3, BaFe12O19and Ba12Ti28Fe15O84, which were confirmed by x-ray powder diffraction. A dense microstructure with a small volume fraction of closed porosity was indicated by the scanning electron microscopy, while a homogeneous distribution of Fe ions over BaTiO3phase was visible from energy dispersive spectroscopy mapping. Doping of BaTiO3with Fe2O3resulted in formation of magnetic hexaferrite phases, as confirmed by dielectric measurements that showed a broadened maximum of the permittivity measured as a function of temperature.",
publisher = "International Institute for the Science of Sintering (IISS)",
journal = "Science of Sintering",
title = "Multiferroic heterostructure BaTiO3/ε-Fe2O3composite obtained by in situ reaction",
pages = "8-1",
number = "1",
volume = "53",
doi = "10.2298/SOS2101001F"
}

Filipović, S., Obradović, N., Andjelković, Lj., Olćan, D., Petrović, J., Mirković, M., Pavlović, V., Jeremić, D., Vlahović, B.,& Đorđević, A.. (2021). Multiferroic heterostructure BaTiO3/ε-Fe2O3composite obtained by in situ reaction. in Science of Sintering
International Institute for the Science of Sintering (IISS)., 53(1), 1-8.
https://doi.org/10.2298/SOS2101001F

Filipović S, Obradović N, Andjelković L, Olćan D, Petrović J, Mirković M, Pavlović V, Jeremić D, Vlahović B, Đorđević A. Multiferroic heterostructure BaTiO3/ε-Fe2O3composite obtained by in situ reaction. in Science of Sintering. 2021;53(1):1-8.
doi:10.2298/SOS2101001F .

Filipović, S., Obradović, N., Andjelković, Lj., Olćan, D., Petrović, J., Mirković, M., Pavlović, V., Jeremić, D., Vlahović, B., Đorđević, A., "Multiferroic heterostructure BaTiO3/ε-Fe2O3composite obtained by in situ reaction" in Science of Sintering, 53, no. 1 (2021):1-8,
https://doi.org/10.2298/SOS2101001F . .

TY  - JOUR
AU  - Filipović, Suzana
AU  - Andjelković, Lj.
AU  - Jeremić, D.
AU  - Vulić, Predrag J.
AU  - Nikolić, A.S.
AU  - Marković, S.
AU  - Paunović, V
AU  - Lević, Steva
AU  - Pavlović, Vladimir
PY  - 2020
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5323
AB  - Barium titanate (BaTiO3) attracts high scientific and technological attention due to good dielectric and electromechanical properties. Although BaTiO3 is one of the most frequently investigated ferroelectric materials, the need for finding new and/or improved synthesis methods of this material still exists. In this paper, a novel, mild synthesis route for producing tetragonal BaTiO3 from barium nitrate and Ti-oxalate precursor is presented. Morphology of the prepared and subsequently sintered BaTiO3 was determined by SEM. Particle size distribution of the as prepared powder was monitored by the laser diffraction. The phase composition, structure and lattice dynamics were investigated by XRD and Raman spectroscopy. Finally, dielectric parameters were determined in the temperature range from 30 to 180 degrees C, and within a variety of frequencies. Curie temperature was detected at 130 degrees C.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Structure and Properties of Nanocrystalline Tetragonal BaTiO3 Prepared by Combustion Solid State Synthesis
EP  - 268
IS  - 3
SP  - 257
VL  - 52
DO  - 10.2298/SOS2003257F
ER  - 

@article{
author = "Filipović, Suzana and Andjelković, Lj. and Jeremić, D. and Vulić, Predrag J. and Nikolić, A.S. and Marković, S. and Paunović, V and Lević, Steva and Pavlović, Vladimir",
year = "2020",
abstract = "Barium titanate (BaTiO3) attracts high scientific and technological attention due to good dielectric and electromechanical properties. Although BaTiO3 is one of the most frequently investigated ferroelectric materials, the need for finding new and/or improved synthesis methods of this material still exists. In this paper, a novel, mild synthesis route for producing tetragonal BaTiO3 from barium nitrate and Ti-oxalate precursor is presented. Morphology of the prepared and subsequently sintered BaTiO3 was determined by SEM. Particle size distribution of the as prepared powder was monitored by the laser diffraction. The phase composition, structure and lattice dynamics were investigated by XRD and Raman spectroscopy. Finally, dielectric parameters were determined in the temperature range from 30 to 180 degrees C, and within a variety of frequencies. Curie temperature was detected at 130 degrees C.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Structure and Properties of Nanocrystalline Tetragonal BaTiO3 Prepared by Combustion Solid State Synthesis",
pages = "268-257",
number = "3",
volume = "52",
doi = "10.2298/SOS2003257F"
}

Filipović, S., Andjelković, Lj., Jeremić, D., Vulić, P. J., Nikolić, A.S., Marković, S., Paunović, V., Lević, S.,& Pavlović, V.. (2020). Structure and Properties of Nanocrystalline Tetragonal BaTiO3 Prepared by Combustion Solid State Synthesis. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 52(3), 257-268.
https://doi.org/10.2298/SOS2003257F

Filipović S, Andjelković L, Jeremić D, Vulić PJ, Nikolić A, Marković S, Paunović V, Lević S, Pavlović V. Structure and Properties of Nanocrystalline Tetragonal BaTiO3 Prepared by Combustion Solid State Synthesis. in Science of Sintering. 2020;52(3):257-268.
doi:10.2298/SOS2003257F .

Filipović, Suzana, Andjelković, Lj., Jeremić, D., Vulić, Predrag J., Nikolić, A.S., Marković, S., Paunović, V, Lević, Steva, Pavlović, Vladimir, "Structure and Properties of Nanocrystalline Tetragonal BaTiO3 Prepared by Combustion Solid State Synthesis" in Science of Sintering, 52, no. 3 (2020):257-268,
https://doi.org/10.2298/SOS2003257F . .

TY  - JOUR
AU  - Božović, Dragan
AU  - Popović, Vera
AU  - Rajicić, Vera
AU  - Kostić, Marko
AU  - Filipović, Vladimir
AU  - Kolarić, Ljubiša
AU  - Ugrenović, Vladan
AU  - Spalević, Velibor
PY  - 2020
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5288
AB  - The objective of this study was to estimate genotype by locality, by year, by treatments (GxLxYxT) interaction using AMMI model, to identify maize genotypes with stable number of rows of grains performance in different growing seasons. The trials conducted with seven maize lines/genotypes, four treatments, two years and at the two locations. The results showed that the influence of genotype (G), year (Y), locality (L), and GxL, GxT, GxLxT, GxYxT, GxYxLxT interaction on maize number of rows of grains were significant (p lt 0.01). The genotype share in the total phenotypic variance for the grains number rows of was 53.50%, and the interaction was 21.15%. The results also show that the sums of the squares of the first and second major components (PC1 and PC2) constitute 100% of the sum of the squares of the interaction GxL. The first PC1 axis belongs to all 100%, which points to the significance of the genotype in the total variation and significance of the genotype for overall interaction with other observed sources of variability. The highest stability in terms of expression of the grains number of rows had the genotype L-6, followed by the genotypes L-4, L-5 and L-3. The lowest stability was demonstrated by the genotypes L-2 and L-1, which confirmed that these genotypes are not important for further selection in terms of this trait.
PB  - Univ Agr Sci & Veterinary Med Cluj-Napoca, Cluj-Napoca
T2  - NOTULAE BOTANICAE HORTI AGROBOTANICI CLUJ-NAPOCA
T1  - Stability of the expression of the maize productivity parameters by AMMI models and GGE-biplot analysis
EP  - 1397
IS  - 3
SP  - 1387
VL  - 48
DO  - 10.15835/nbha48312058
ER  - 

@article{
author = "Božović, Dragan and Popović, Vera and Rajicić, Vera and Kostić, Marko and Filipović, Vladimir and Kolarić, Ljubiša and Ugrenović, Vladan and Spalević, Velibor",
year = "2020",
abstract = "The objective of this study was to estimate genotype by locality, by year, by treatments (GxLxYxT) interaction using AMMI model, to identify maize genotypes with stable number of rows of grains performance in different growing seasons. The trials conducted with seven maize lines/genotypes, four treatments, two years and at the two locations. The results showed that the influence of genotype (G), year (Y), locality (L), and GxL, GxT, GxLxT, GxYxT, GxYxLxT interaction on maize number of rows of grains were significant (p lt 0.01). The genotype share in the total phenotypic variance for the grains number rows of was 53.50%, and the interaction was 21.15%. The results also show that the sums of the squares of the first and second major components (PC1 and PC2) constitute 100% of the sum of the squares of the interaction GxL. The first PC1 axis belongs to all 100%, which points to the significance of the genotype in the total variation and significance of the genotype for overall interaction with other observed sources of variability. The highest stability in terms of expression of the grains number of rows had the genotype L-6, followed by the genotypes L-4, L-5 and L-3. The lowest stability was demonstrated by the genotypes L-2 and L-1, which confirmed that these genotypes are not important for further selection in terms of this trait.",
publisher = "Univ Agr Sci & Veterinary Med Cluj-Napoca, Cluj-Napoca",
journal = "NOTULAE BOTANICAE HORTI AGROBOTANICI CLUJ-NAPOCA",
title = "Stability of the expression of the maize productivity parameters by AMMI models and GGE-biplot analysis",
pages = "1397-1387",
number = "3",
volume = "48",
doi = "10.15835/nbha48312058"
}

Božović, D., Popović, V., Rajicić, V., Kostić, M., Filipović, V., Kolarić, L., Ugrenović, V.,& Spalević, V.. (2020). Stability of the expression of the maize productivity parameters by AMMI models and GGE-biplot analysis. in NOTULAE BOTANICAE HORTI AGROBOTANICI CLUJ-NAPOCA
Univ Agr Sci & Veterinary Med Cluj-Napoca, Cluj-Napoca., 48(3), 1387-1397.
https://doi.org/10.15835/nbha48312058

Božović D, Popović V, Rajicić V, Kostić M, Filipović V, Kolarić L, Ugrenović V, Spalević V. Stability of the expression of the maize productivity parameters by AMMI models and GGE-biplot analysis. in NOTULAE BOTANICAE HORTI AGROBOTANICI CLUJ-NAPOCA. 2020;48(3):1387-1397.
doi:10.15835/nbha48312058 .

Božović, Dragan, Popović, Vera, Rajicić, Vera, Kostić, Marko, Filipović, Vladimir, Kolarić, Ljubiša, Ugrenović, Vladan, Spalević, Velibor, "Stability of the expression of the maize productivity parameters by AMMI models and GGE-biplot analysis" in NOTULAE BOTANICAE HORTI AGROBOTANICI CLUJ-NAPOCA, 48, no. 3 (2020):1387-1397,
https://doi.org/10.15835/nbha48312058 . .

TY  - JOUR
AU  - Rajić, Vladimir
AU  - Stojković-Simatović, Ivana
AU  - Veselinović, Ljiljana
AU  - Belosević-Cavor, Jelena
AU  - Novaković, Mirjana
AU  - Popović, Maja
AU  - Skapin, Sreco Davor
AU  - Mojović, Milos
AU  - Stojadinović, Stevan
AU  - Rac, Vladislav
AU  - Janković-Castvan, Ivona
AU  - Marković, Smilja
PY  - 2020
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5324
AB  - Eco-friendly and rapid microwave processing of a precipitate was used to produce Fe-doped zinc oxide (Zn1-xFexO,x= 0, 0.05, 0.1, 0.15 and 0.20; ZnO:Fe) nanoparticles, which were tested as catalysts toward the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in a moderately alkaline solution. The phase composition, crystal structure, morphology, textural properties, surface chemistry, optical properties and band structure were examined to comprehend the influence of Zn(2+)partial substitution with Fe(3+)on the catalytic activity of ZnO:Fe. Linear sweep voltammetry showed an improved catalytic activity of ZnO:5Fe toward the ORR, compared to pure ZnO, while with increased amounts of the Fe-dopant the activity decreased. The improvement was suggested by a more positive onset potential (0.394 Vvs.RHE), current density (0.231 mA cm(-2)at 0.150 Vvs.RHE), and faster kinetics (Tafel slope,b= 248 mV dec(-1)), and it may be due to the synergistic effect of (1) a sufficient amount of surface oxygen vacancies, and (2) a certain amount of plate-like particles composed of crystallites with well developed (0001) and (0001x304;) facets. Quite the contrary, the OER study showed that the introduction of Fe(3+)ions into the ZnO crystal structure resulted in enhanced catalytic activity of all ZnO:Fe samples, compared to pure ZnO, probably due to the modified binding energy and an optimized band structure. With the maximal current density of 1.066 mA cm(-2)at 2.216 Vvs.RHE, an onset potential of 1.856 Vvs.RHE, and the smallest potential difference between the OER and ORR (Delta E= 1.58 V), ZnO:10Fe may be considered a promising bifunctional catalyst toward the OER/ORR in moderately alkaline solution. This study demonstrates that the electrocatalytic activity of ZnO:Fe strongly depends on the defect chemistry and consequently the band structure. Along with providing fundamental insight into the electrocatalytic activity of ZnO:Fe, the study also indicates an optimal stoichiometry for enhanced bifunctional activity toward the OER/ORR, compared to pure ZnO.
PB  - Royal Soc Chemistry, Cambridge
T2  - Physical Chemistry Chemical Physics
T1  - Bifunctional catalytic activity of Zn1-xFexO toward the OER/ORR: seeking an optimal stoichiometry
EP  - 22095
IS  - 38
SP  - 22078
VL  - 22
DO  - 10.1039/d0cp03377d
ER  - 

@article{
author = "Rajić, Vladimir and Stojković-Simatović, Ivana and Veselinović, Ljiljana and Belosević-Cavor, Jelena and Novaković, Mirjana and Popović, Maja and Skapin, Sreco Davor and Mojović, Milos and Stojadinović, Stevan and Rac, Vladislav and Janković-Castvan, Ivona and Marković, Smilja",
year = "2020",
abstract = "Eco-friendly and rapid microwave processing of a precipitate was used to produce Fe-doped zinc oxide (Zn1-xFexO,x= 0, 0.05, 0.1, 0.15 and 0.20; ZnO:Fe) nanoparticles, which were tested as catalysts toward the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in a moderately alkaline solution. The phase composition, crystal structure, morphology, textural properties, surface chemistry, optical properties and band structure were examined to comprehend the influence of Zn(2+)partial substitution with Fe(3+)on the catalytic activity of ZnO:Fe. Linear sweep voltammetry showed an improved catalytic activity of ZnO:5Fe toward the ORR, compared to pure ZnO, while with increased amounts of the Fe-dopant the activity decreased. The improvement was suggested by a more positive onset potential (0.394 Vvs.RHE), current density (0.231 mA cm(-2)at 0.150 Vvs.RHE), and faster kinetics (Tafel slope,b= 248 mV dec(-1)), and it may be due to the synergistic effect of (1) a sufficient amount of surface oxygen vacancies, and (2) a certain amount of plate-like particles composed of crystallites with well developed (0001) and (0001x304;) facets. Quite the contrary, the OER study showed that the introduction of Fe(3+)ions into the ZnO crystal structure resulted in enhanced catalytic activity of all ZnO:Fe samples, compared to pure ZnO, probably due to the modified binding energy and an optimized band structure. With the maximal current density of 1.066 mA cm(-2)at 2.216 Vvs.RHE, an onset potential of 1.856 Vvs.RHE, and the smallest potential difference between the OER and ORR (Delta E= 1.58 V), ZnO:10Fe may be considered a promising bifunctional catalyst toward the OER/ORR in moderately alkaline solution. This study demonstrates that the electrocatalytic activity of ZnO:Fe strongly depends on the defect chemistry and consequently the band structure. Along with providing fundamental insight into the electrocatalytic activity of ZnO:Fe, the study also indicates an optimal stoichiometry for enhanced bifunctional activity toward the OER/ORR, compared to pure ZnO.",
publisher = "Royal Soc Chemistry, Cambridge",
journal = "Physical Chemistry Chemical Physics",
title = "Bifunctional catalytic activity of Zn1-xFexO toward the OER/ORR: seeking an optimal stoichiometry",
pages = "22095-22078",
number = "38",
volume = "22",
doi = "10.1039/d0cp03377d"
}

Rajić, V., Stojković-Simatović, I., Veselinović, L., Belosević-Cavor, J., Novaković, M., Popović, M., Skapin, S. D., Mojović, M., Stojadinović, S., Rac, V., Janković-Castvan, I.,& Marković, S.. (2020). Bifunctional catalytic activity of Zn1-xFexO toward the OER/ORR: seeking an optimal stoichiometry. in Physical Chemistry Chemical Physics
Royal Soc Chemistry, Cambridge., 22(38), 22078-22095.
https://doi.org/10.1039/d0cp03377d

Rajić V, Stojković-Simatović I, Veselinović L, Belosević-Cavor J, Novaković M, Popović M, Skapin SD, Mojović M, Stojadinović S, Rac V, Janković-Castvan I, Marković S. Bifunctional catalytic activity of Zn1-xFexO toward the OER/ORR: seeking an optimal stoichiometry. in Physical Chemistry Chemical Physics. 2020;22(38):22078-22095.
doi:10.1039/d0cp03377d .

Rajić, Vladimir, Stojković-Simatović, Ivana, Veselinović, Ljiljana, Belosević-Cavor, Jelena, Novaković, Mirjana, Popović, Maja, Skapin, Sreco Davor, Mojović, Milos, Stojadinović, Stevan, Rac, Vladislav, Janković-Castvan, Ivona, Marković, Smilja, "Bifunctional catalytic activity of Zn1-xFexO toward the OER/ORR: seeking an optimal stoichiometry" in Physical Chemistry Chemical Physics, 22, no. 38 (2020):22078-22095,
https://doi.org/10.1039/d0cp03377d . .