Influence of some sol-gel synthesis parameters of mesoporous TiO2 on photocatalytic degradation of pollutants
| Autor: | N. Tomić, Biljana Babić, Maja Šćepanović, Dušan Ž. Mijin, M. Grujić-Brojčin, Ivana Veljković, A. Golubović |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Raman scattering
Anatase Materials science General Chemical Engineering Mineralogy 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention chemistry.chemical_compound law nanostructures Calcination lcsh:Chemical engineering lcsh:HD9650-9663 lcsh:TP155-156 021001 nanoscience & nanotechnology Titanate 0104 chemical sciences X-ray diffraction chemistry 13. Climate action Rutile Titanium dioxide Photocatalysis Crystallite anatase 0210 nano-technology Mesoporous material Nuclear chemistry lcsh:Chemical industries |
| Zdroj: | Chemical Industry and Chemical Engineering Quarterly, Vol 22, Iss 1, Pp 65-73 (2016) Chemical Industry & Chemical Engineering Quarterly Chemical Industry and Chemical Engineering Quarterly / CICEQ |
| ISSN: | 2217-7434 1451-9372 |
| Popis: | The titanium dioxide (TiO2) nanopowders were produced by sol-gel technique from tetrabutyl titanate as a precursor by varying some parameters of the sol-gel synthesis like the temperature (500 and 550 °C) and the duration of the calcination (1.5, 2, and 2.5 h). X-ray powder diffraction (XRPD) results have shown that all synthesized nanopowders are dominantly in anatase phase, with the presence of a small amount of rutile in samples calcined at 550 °C. According to the results obtained by Williamson-Hall method, the anatase crystallite size was increased with the duration of the calcination (from 24 to 29 nm in samples calcined at lower, and from 30 to 35 nm in samples calcined at higher temperature). The analysis of the shift and linewidth of the most intensive anatase Eg Raman mode confirmed the XRPD results. The analysis of pore structure from nitrogen sorption experimental data described all samples as mesoporous, with mean pore diameters in the range of 5-8 nm. Nanopowder properties have been related to the photocatalytic activity, tested in degradation of the textile dye (C.I. Reactive Orange 16), carbofuran and phenol. [Projekat Ministarstva nauke Republike Srbije, br. III45018 i br. ON171032] |
| Databáze: | OpenAIRE |
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