Application of Zirconia/Alumina composite oxide ceramics as photocatalysts for removal of 2,4,6-trichlorophenol from water
Аутори
Vulić, TatjanaCarević, Milica
Abazović, Nadica
Novaković, Tatjana
Mojović, Zorica
Čomor, Mirjana
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
The mesoporous zirconia/alumina composites were synthesized via a sol–gel method,
followed by heat treatment at 500 ◦C for 5 h. The effect of the ZrO2/Al2O3 ratio on the structural and
textural properties of the obtained composites was explored. Sorption analysis has confirmed that
all samples have a mesoporous structure whose parameters (SBET, Vp and Dmax) strongly depend
on the ZrO2/Al2O3 ratio. The XRD pattern of composites has shown that the addition of zirconia
disrupts the crystallinity of alumina. The composites with higher zirconia content (50% ZrO2 and
67% ZrO2
) are characterized by peaks related only to the zirconia phase. UV/Vis diffuse reflection
spectra of all samples revealed that composites have more intensive absorption compared to pure
oxides for wavelengths larger than 250 nm and similar band gaps. Photoluminescence measurements
showed presence of defects in all samples, which are responsible for photocatalytic activity. All
samples showed significant adso...rption/photocatalytic efficacy for the removal/degradation of 2,4,6
-trichlorophenol (TCP). Results obtained using HPLC and TOC techniques showed that between 70
and 80% of the initial TCP concentration was removed/degraded after 4 h of illumination. These
results were corelated with flat, conduction and valence band potentials of synthesized pure and
binary oxides, calculated using Mott–Schottky plots.
Кључне речи:
photocatalysis / binary oxides / adsorption / flat band potentialsИзвор:
Photochem, 2022, 2, 905-917Издавач:
- MDPI
Финансирање / пројекти:
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200026 (Универзитет у Београду, Институт за хемију, технологију и металургију - ИХТМ) (RS-MESTD-inst-2020-200026)
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200017 (Универзитет у Београду, Институт за нуклеарне науке Винча, Београд-Винча) (RS-MESTD-inst-2020-200017)
Институција/група
IHTMTY - JOUR AU - Vulić, Tatjana AU - Carević, Milica AU - Abazović, Nadica AU - Novaković, Tatjana AU - Mojović, Zorica AU - Čomor, Mirjana PY - 2022 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/5518 AB - The mesoporous zirconia/alumina composites were synthesized via a sol–gel method, followed by heat treatment at 500 ◦C for 5 h. The effect of the ZrO2/Al2O3 ratio on the structural and textural properties of the obtained composites was explored. Sorption analysis has confirmed that all samples have a mesoporous structure whose parameters (SBET, Vp and Dmax) strongly depend on the ZrO2/Al2O3 ratio. The XRD pattern of composites has shown that the addition of zirconia disrupts the crystallinity of alumina. The composites with higher zirconia content (50% ZrO2 and 67% ZrO2 ) are characterized by peaks related only to the zirconia phase. UV/Vis diffuse reflection spectra of all samples revealed that composites have more intensive absorption compared to pure oxides for wavelengths larger than 250 nm and similar band gaps. Photoluminescence measurements showed presence of defects in all samples, which are responsible for photocatalytic activity. All samples showed significant adsorption/photocatalytic efficacy for the removal/degradation of 2,4,6 -trichlorophenol (TCP). Results obtained using HPLC and TOC techniques showed that between 70 and 80% of the initial TCP concentration was removed/degraded after 4 h of illumination. These results were corelated with flat, conduction and valence band potentials of synthesized pure and binary oxides, calculated using Mott–Schottky plots. PB - MDPI T2 - Photochem T1 - Application of Zirconia/Alumina composite oxide ceramics as photocatalysts for removal of 2,4,6-trichlorophenol from water VL - 2 SP - 905 EP - 917 DO - 10.3390/photochem2040058 ER -
@article{ author = "Vulić, Tatjana and Carević, Milica and Abazović, Nadica and Novaković, Tatjana and Mojović, Zorica and Čomor, Mirjana", year = "2022", abstract = "The mesoporous zirconia/alumina composites were synthesized via a sol–gel method, followed by heat treatment at 500 ◦C for 5 h. The effect of the ZrO2/Al2O3 ratio on the structural and textural properties of the obtained composites was explored. Sorption analysis has confirmed that all samples have a mesoporous structure whose parameters (SBET, Vp and Dmax) strongly depend on the ZrO2/Al2O3 ratio. The XRD pattern of composites has shown that the addition of zirconia disrupts the crystallinity of alumina. The composites with higher zirconia content (50% ZrO2 and 67% ZrO2 ) are characterized by peaks related only to the zirconia phase. UV/Vis diffuse reflection spectra of all samples revealed that composites have more intensive absorption compared to pure oxides for wavelengths larger than 250 nm and similar band gaps. Photoluminescence measurements showed presence of defects in all samples, which are responsible for photocatalytic activity. All samples showed significant adsorption/photocatalytic efficacy for the removal/degradation of 2,4,6 -trichlorophenol (TCP). Results obtained using HPLC and TOC techniques showed that between 70 and 80% of the initial TCP concentration was removed/degraded after 4 h of illumination. These results were corelated with flat, conduction and valence band potentials of synthesized pure and binary oxides, calculated using Mott–Schottky plots.", publisher = "MDPI", journal = "Photochem", title = "Application of Zirconia/Alumina composite oxide ceramics as photocatalysts for removal of 2,4,6-trichlorophenol from water", volume = "2", pages = "905-917", doi = "10.3390/photochem2040058" }
Vulić, T., Carević, M., Abazović, N., Novaković, T., Mojović, Z.,& Čomor, M.. (2022). Application of Zirconia/Alumina composite oxide ceramics as photocatalysts for removal of 2,4,6-trichlorophenol from water. in Photochem MDPI., 2, 905-917. https://doi.org/10.3390/photochem2040058
Vulić T, Carević M, Abazović N, Novaković T, Mojović Z, Čomor M. Application of Zirconia/Alumina composite oxide ceramics as photocatalysts for removal of 2,4,6-trichlorophenol from water. in Photochem. 2022;2:905-917. doi:10.3390/photochem2040058 .
Vulić, Tatjana, Carević, Milica, Abazović, Nadica, Novaković, Tatjana, Mojović, Zorica, Čomor, Mirjana, "Application of Zirconia/Alumina composite oxide ceramics as photocatalysts for removal of 2,4,6-trichlorophenol from water" in Photochem, 2 (2022):905-917, https://doi.org/10.3390/photochem2040058 . .