期刊
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
卷 23, 期 13, 页码 13191-13199出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-016-6438-2
关键词
ZnO; Zn2TiO4; Multicomponent oxide; Benzene; Photocatalysis
资金
- Consejo de Ciencia y Tecnologia del Estado de Queretaro (CONCyTEQ) [Fomix 2012-192880]
- Consejo Nacional de Ciencia y Tecnologia (CONACyT) [CB-2008-106912]
- CONACyT
The benzene pollutant in gaseous phase was successfully degraded by using ZnO + Zn2TiO4 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 TiO2 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.
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