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- Title
Gaseous benzene degradation by photocatalysis using ZnO + ZnTiO thin films obtained by sol-gel process.
- Authors
Hernández-García, F.; Torres-Delgado, G.; Castanedo-Pérez, R.; Zelaya-Ángel, O.
- Abstract
The benzene pollutant in gaseous phase was successfully degraded by using ZnO + ZnTiO multicomponent oxide thin films as photocatalysts. The films were obtained with different Ti/Zn ratios (0, 0.20, 0.40, 0.45, 0.50, 0.67, 0.84, and 1) by the sol-gel route. The initial level of benzene concentration was 110 ± 10 ppm. The process was carried out under different conditions of relative humidity (RH): 25, 50, and 80 % in a batch-type reactor, at room temperature. The results show benzene degradation near to 95 % at t = 240 min, where the multicomponent oxide semiconductor has a Ti/Zn ratio of 0.67. Meanwhile, with the TiO thin films, only a degradation of 70 % was reached at the same measurement conditions. This synergistic effect on the photocatalytic activity is a result of the coupling of both semiconductor oxides. An adverse effect on the photocatalytic activity was observed as the relative humidity increases.
- Subjects
BENZENE; POLLUTION; ZINC oxide films; PHOTOCATALYSTS; CHEMICAL decomposition; SEMICONDUCTOR research
- Publication
Environmental Science & Pollution Research, 2016, Vol 23, Issue 13, p13191
- ISSN
0944-1344
- Publication type
Article
- DOI
10.1007/s11356-016-6438-2