Preparation of TiO{sub}2 films with doping transition metals by sol-gel processing and their photocatalytic properties

摘要

TiO{sub}2 films with doping transition metals were prepared by sol-gel processing. The absorbance of the TiO{sub}2 films in the range of 500 - 700 nm was increased by doping V, Mn or Cu ions. Their photocatalytic ability for decomposing methylene blue was less than that of the original TiO{sub}2 films under illumination of both uv-and vis-light. Upon the heat treatment above 650°C, a new compound V{sub}2TiO{sub}6 showed up leading to formation of non-transparent films and thus its photocatalytic ability for decomposing methylene blue was not determined. The method for testing of photocatalysis was developed in a semi-quantitative manner.