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Study on the Photocatalytic Hydrolysis of Methylacetylene under Visible Light Irradiation Ⅱ. Effect of Vanadium Ion on Performance of Titania Photocatalyst

ZHANG Jinlong 1* , CHEN Haijun 1, XU Huasheng 1, Masakazu ANPO 2(1 Institute of Fine Chemicals, East China University of Science and Technology, Shanghai 200237, China; 2 Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1 1 Gakuen cho, Sakai, Osaka 599 8531, Japan)  
The photocatalytic performance of some kinds of titania photocatalyst with different grain size for hydrolysis of methylacetylene under visible light irradiation was investigated. The results showed that using ion implantation was able to extend photo absorption regions of nano photocatalyst, resulting in the shift of absorption band of titania photocatalyst to visible light, and the extent of shift increased with increasing titania grain size. Especially, the implantation of V ion made the photocatalyst possessing catalytic activity in the region of visible light. After implantation of V ion, the photocatalytic activity of titania catalyst did not decrease in the UV region but increase in the visible light region. Among the five kinds of photocatalyst, V ion implanted P 25 with middle grain size exhibits the highest photocatalytic activity. These kinds of photocatalyst also possessed high catalytic activity under solar light irradiation.
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