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用溶胶-凝胶法将纳米TiO2:Sb薄膜沉积在玻璃基板上．通过XRD、Raman光谱研究了Sb掺杂量对薄膜的晶体结构和晶相转变的影响．结果表明:纯TiO2薄膜中,TiO2不仅以无定型态存在,而且还以板钛矿和锐钛矿的形式存在．掺入适量的Sb后,由于Sb替代了TiO2的部分Ti形成Sb-O-Ti结构,改变了TiO2的晶格结构,改善了薄膜的结晶效率,使锐钛矿结构的TiO2:Sb含量明显提高．掺杂0．2％Sb时,薄膜的结晶效率最高．254 nm光源照射时,掺杂0．2％Sb的电极的阳极光电流密度可达42．49μA／cm2,是用同种方法制备的纯TiO2薄膜电极的近11倍;对亚甲基蓝具有最高分解性能,其一级反应速率常数为0．171 h／cm2,是未掺杂的纯TiO2薄膜的近2倍．
The nano-TiO2: Sb film was deposited on the glass substrate by sol-gel method. The effect of Sb doping on the crystal structure and crystal phase transition of the films was investigated by XRD and Raman spectroscopy. The results show that TiO2 is not only in the amorphous state but also in the form of brookite and anatase. After adding proper amount of Sb, the structure of Sb-O-Ti is replaced by part of Ti which substitutes Sb for TiO2, which changes the lattice structure of TiO2 and improves the crystallization efficiency of TiO2 film. The content of TiO2: Sb of anatase structure obviously increases . When doped with 0.2% Sb, the crystallization efficiency of the film is the highest. The photocurrent density of anode doped with 0.2% Sb electrode was 42.49μA / cm2 when irradiated with 254 nm light source, which was almost 11 times that of the pure TiO2 membrane electrode prepared by the same method. The highest decomposition capacity of methylene blue , The first-order reaction rate constant is 0.171 h / cm2, which is nearly twice that of undoped pure TiO2 film.