掺锡TiO<sub>2</sub>复合薄膜的制备和光催化性能的研究

余家国; 赵修建; 赵青南

掺锡TiO₂复合薄膜的制备和光催化性能的研究

武汉工业大学材料复合新技术国家实验室,武汉 430070

基金项目: 湖北省自然科学基金资助项目(98J029)

详细信息

作者简介:
余家国(1963),男,博士, 研究方向:生态建筑材料。

中图分类号: TB332;O643
计量
- 文章访问数: 1558
- HTML全文浏览量: 65
- PDF下载量: 878
出版历程
- 收稿日期: 1999-08-22
- 修回日期: 1999-10-08
- 刊出日期: 2001-02-14

PREPARATION OF Sn-DOPED TiO₂ COMPOSITE THIN FILMS BY SOL-GEL PROCESSING AND THEIR PHOTO-CATALYTIC PROPERTIES

State Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070,China

摘要

摘要: 通过溶胶-凝胶工艺在玻璃表面制备了均匀透明的掺锡锐钛矿型TiO₂光催化复合薄膜,用SEM、XRD、XPS等对薄膜进行了表征。薄膜中除含有Ti,O, Sn等元素外,还存在一定量的来自有机前驱物未完全燃烧的C元素和从玻璃表面扩散到薄膜中的Na和Ca元素。甲基橙水溶液的光催化降解实验表明:掺锡TiO₂复合薄膜的表观降解速率常数明显高于未掺锡TiO₂薄膜的表观降解速率常数,这为进一步提高TiO₂薄膜的光催化活性开辟了新的途径。
- 溶胶-凝胶工艺 /
- 掺锡TiO₂复合薄膜 /
- 光催化性能
Abstract: The uniform, transparent anatase Sn-doped TiO₂ composite thin films deposited on glass substrates were prepared by sol-gel processing. Sn-doped TiO₂ films were composed of TiO₂ sphere particles in size of 50~100 nm. The thickness of TiO₂ films prepared by 1 cycle (from dipping to teat-treatment at 500℃,1 h) is 0.09 μm or so. Anatase TiO₂ films show some orientation effect in (101) peak. XPS results have showed that besides Ti, O and Sn elements in films there are a certain amount of residual carbon from the starting organometallic components and a small amount of Na and Ca elements diffused from the glass substrates. Photo-catalytic degradation of Methyl orange aqueous solution has indicated that the sol-gel derived Sn-doped TiO₂ films show good photo-catalytic activity, and its apparent degradation rate constant k is larger than that of un-doped TiO₂ films. These results are explained on the basis of the principle of charge separation in an SnO₂/TiO₂ composite semiconductor system.
- sol-gel processing /
- Sn-doped TiO₂ composite thin films /
- photo-catalytic properties