摘要：

采用溶胶-凝胶技术，以普通载玻片为基底材料，制备了掺杂Fe₂O₃的TiO₂薄膜，用TEM、TG-DTA、XRD对TiO₂薄膜进行结构表征。用掺杂Fe₂O₃的TiO₂薄膜降解有机染料废水中的甲基橙。结果表明，焙烧温度500℃时，制备的TiO₂薄膜牢固，有较好的光催化活性。在pH为4，投加一定量的H₂O₂，太阳光照射30 min条件下，甲基橙的降解率达到93.02%。和纯纳米TiO₂膜相比提高了3%以上。

关键词: 溶胶-凝胶, 纳米二氧化钛, 光催化降解

Abstract:

Transparent Fe₂O₃-doping TiO₂ thin film on soda lime glass substrates has been prepared by using sol-gel method. TiO₂ thin films are characterized by TEM, TG-DTA, XRD. The Fe₂O₃-doping TiO₂ thin film is found to be very active in photocatalytic decomposition of methyl orange aqueous solution. The result shows that the TiO₂ film calcined at 500 ℃ is very solid and has good photocatalytic activity. Compared with common TiO₂ film, the degradation rate of methyl orange goes higher more than 3% and is up to 93.02% when the film is irradiated 30 min by sunlight in the pH=4, adding H₂O₂.

Key words: sol-gel, nano titanium dioxide, photocatalytic degradation

中图分类号: 

• X131.2

• X788