硅酸盐学报2011，Vol.39Issue(2)：325-328,333,5.
热处理温度对纳米TiO2薄膜光催化性能的影响
Influence of Heat Treatment Temperature on Photocatalytic Properties of Nano-TiO2 Film
摘要
Abstract
Nano-TiO2 film was deposited in diatomite-based porous ceramics by the hydrolysis precipitation with TiCl4 as raw material,ammonia as precipitating agent. Samples heat treated at different temperatures were characterized by thermogravimetry-differential scanning thermal analysis and X-ray diffraction. The influence of the heat treatment temperature on TiO2 crystal phase, grain size and other factors was investigated. The effects of heat treatment temperature to photo-catalysis property of TiO2 film were also inspected by degradation of formaldehyde. The results indicate that with the increase of the heat treatment temperature, the film crystal transform from anatase into rutile, and TiO2 grain size increase from 6.5nm (350 ℃) to 52.8nm (1 000 ℃); For samples heat treated at 750 ℃, the content of TiO2 film occurs rutile TiO2; The temperature was improved to 1000 ℃, anatase TiO2 disappeared entirely.When TiO2 film is heat treated at 550 ℃, the removal rate of formaldehyde with initial concentration 0.526 mg/m3 is the maximum,and reaches 95.2％ in 1 m3 environment chambers under 8 W ultraviolet lamp irradiation for 240 min.关键词
二氧化钛薄膜/热处理温度/晶相/晶粒尺寸/光催化活性Key words
titania film/ heat treatment temperature/ crystal phase/ grain size/ photo-catalytic activity分类
通用工业技术引用本文复制引用
高如琴,朱灵峰,郭毅萍,张润涛..热处理温度对纳米TiO2薄膜光催化性能的影响[J].硅酸盐学报,2011,39(2):325-328,333,5.基金项目
河南省教育厅自然科学研究计划项目(2011B610005) （2011B610005）
华北水利水电学院科研启动金(200930)资助项目. （200930）
