STUDY ON PHOTOCATALYTIC MECHANISM OF SOL-GEL-DERIVED Pb-DOPED TiO₂ THIN FILMS

YU Jiaguo ZHAO Qingnan ZHAO Xiujian Wuhan University of Technology

摘 要：<正> Pb-doped TiO2 photocatalytic thin films were prepared on a soda-lime glass substrate via sol-gel method using TiO2 sol solution containing lead and characterized by X-ray photoelectron spectroscopy （XPS）. The results showed that besides oxides of Ti（IV） there is a certain amount of oxides of To（Ⅲ） and Ti（Ⅱ） and Pb exists in the forms of PbTiO3 and PbO. The photocatalytic activity of the Pb-doped TiO2 films was evaluated by the photocatalytic decolorization of aqueous methyl orange and photocatalytic mechanism mas also analyzed.

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