Citation: WU Da-Wang, LI Shuo, CHEN Yao-Qiang, NG Mao-Chu, ZHANG Qiu-Lin, LIU Kang-Lian, WANG Yu-Lin. Photocatalytic Degradation of Gas Phase Benzene over WO₃/Bi₁₂SiO₂₀[J]. Acta Physico-Chimica Sinica, ;2010, 26(12): 3299-3304. doi: 10.3866/PKU.WHXB20101139 shu

Photocatalytic Degradation of Gas Phase Benzene over WO₃/Bi₁₂SiO₂₀

1.
1. Department of Chemistry and Chemical Engineering, Qiannan National Normal University, Duyun 558000, Guizhou Province, P. R. China;
2. Key Laboratory of Green Chemistry and Technology of the Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China;
3. Chemical and Biological Institute of Technology, Yantai University, Yantai 264001, Shandong Province, P. R. China

Received Date: 13 June 2010
Available Online: 20 October 2010
Fund Project: 贵州省教育厅自然科学基金(2005221)资助项目 (2005221)

WO₃ and Bi₁₂SiO₂₀ powders were prepared by a gas-liquid reaction and chemical solution decomposition, respectively. WO₃/Bi₁₂SiO₂₀ photocatalysts were coupled by mixing WO₃ and Bi₁₂SiO₂₀. The reduction of benzene was used to investigate the activity of WO₃/Bi₁₂SiO₂₀. The results indicate that the activity of the coupled WO₃/Bi₁₂SiO₂₀ catalysts increased substantially. The degradation behavior of benzene over 30%(w) WO₃/Bi₁₂SiO₂₀ under UV irradiation was obviously better than that of P-25, and the degradation of benzene under visible light was also considerable. The photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS). The results showed that there was a od synergistic effect between WO₃ and Bi₁₂SiO₂₀. The photogenerated electrons and holes were effectively separated after coupling between WO₃ and Bi₁₂SiO₂₀ and the rate of electron and hole production increased. The electrons and holes were effectively separated and the photocatalytic activity increased accordingly.
- Coupling,
- Photocatalysis,
- Degradation,
- Gas benzene
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Photocatalytic Degradation of Gas Phase Benzene over WO₃/Bi₁₂SiO₂₀