Nanocrystalline TiO₂ Composte Films for Enhanced Photocatalytic Activity

Abstract:

In order to extend light response of TiO₂ into the visible region and enhance its photocatalytic activity, V and W surface codoped nanocrytalline TiO₂ film was synthesized by the sol-gel method. Tetrabutyl titanate (Ti (OC₄H₉)₄) was chosen as the precursor, and ammonium metavanadate or ammonium tungstate was chosen as vanadium or tungsten source. The high-resolution field emission scanning electron microscopy (FE-SEM) results revealed that the film was composed of uniform round-like nanoparticles with size smaller than 6 nm. The photocatalytic activities of TiO₂ films were investigated by degradation of organic dyes in aqueous solutions. V and W codoped TiO₂ film exhibited excellent photocatalytic activity compared to undoped TiO₂ film or single doped TiO₂ film. The improvement mechanism by V and W codoping was also discussed. Keywords: Nanocrystalline TiO₂; Composte films; Photocatalytic activity

• Periodical: Applied Mechanics and Materials (Volumes 457-458)
• Pages: 98-101
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.457-458.98
• Online since: October 2013
• Authors: Mei Li Dai, Ji Jun Feng, Fang Li, Ming Ming Yao
• Keywords: Composte Films, Nanocrystalline TiO₂, Photocatalytic Activity

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