Tuning the acidity of niobia: Characterization and catalytic activity of Nb2O5-MeO2 (Me = Ti, Zr, Ce) mesoporous mixed oxides
Само за регистроване кориснике
2014
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
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-C...eO2 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.
Кључне речи:
Adsorption / Chemisorption / Oxides / Chemical techniques / SurfacesИзвор:
Materials Chemistry and Physics, 2014, 146, 3, 337-345Издавач:
- Elsevier Science Sa, Lausanne
Финансирање / пројекти:
- French National Research AgencyFrench National Research Agency (ANR) [ANR-09-CP2D-19]
DOI: 10.1016/j.matchemphys.2014.03.033
ISSN: 0254-0584
WoS: 000336694300020
Scopus: 2-s2.0-84899944996
Институција/група
Poljoprivredni fakultetTY - 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 . .