中华医学超声杂志

应用化学 ›› 1997, Vol. 0 ›› Issue (4): 76-79.

• 研究论文 • 上一篇    下一篇

TiO2/Pt/glass纳米薄膜的制备及对可溶性染料的光电催化降解

符小荣1, 张校刚2, 宋世庚1, 王学燕1, 谭辉1, 陶明德1   

  1. 1. 中国科学院新疆物理研究所, 乌鲁木齐 830011;
    2. 新疆大学化学系, 乌鲁木齐
  • 收稿日期:1996-09-10 修回日期:1997-05-13 出版日期:1997-08-10 发布日期:1997-08-10

Preparation of Nano sized TiO2/Pt/Glass Thin Films by Sol-gel Method and Their Use in Photoelectric Degradation of Soluble Dye

Fu Xiaorong1, Zhang Xiaogang2, Song Shigeng1, Wang Xueyan1, Tan Hui1, Tao Mingde 1   

  1. 1. Xinjiang Institute of Physics, Chinese Academy of Sciences, Urumqi 830011;
    2. Department of Chemistry, Xinjiang University, Urumqi
  • Received:1996-09-10 Revised:1997-05-13 Published:1997-08-10 Online:1997-08-10

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摘要： 利用溶胶-凝胶技术(sol -gel)制备薄膜型光催化剂现已引起了越来越多人的注意, 以sol-gel法制备的TiO2/ glass薄膜降解气态乙醛比TiO2粉有效[1]; 以此技术在石英试管上制得的TiO2 薄膜, 此种锐钛矿结构的 TiO2明显较金红石型催化活性高, 且薄膜具有很高的稳定性[2]. 制备高活性光催化剂的突出问题是如何减少光生电子与空穴的复合几率[3], Sabat e等采用sol-gel法制备了掺Nb的TiO2薄膜, 发现尽管掺Nb的TiO2薄膜的光吸收增强, 但由于增加了复合中心反而使得光催化活性降低[4]. Vinodg opal制备了耦合的SnO2/ TiO2薄膜, 并施加一定的正向偏压, 发现薄膜的光催化活性得到了很大提高[3]. 目前国内对光催化的研究还仍以 TiO2粉末悬浮相为主[5～7], 虽然也有关于 TiO2薄层的报道, 但起始出发材料仍限于粉末. 本文以 sol-gel 法, 分别选用玻璃和镀 Pt 的玻璃片作为衬底, 制得了催化活性高于 TiO2/glass的TiO2/Pt/glass薄膜, 并且当输入一定正向偏压后TiO2/Pt/ glass薄膜的光催化活性得到了进一步提高。

关键词: 光催化, TiO2, 光电化学, 薄膜, 溶胶－凝胶法

Abstract: TiO2/Pt/glass and TiO2/glass thin films in nanocrystalline have been prepared by sol-gel method and their structures and elctrochemically assisted photocatalysis have been examined. The results of electrochemically assisted photocatalytic degradation of dye solution by thin films indicate that the photocalytic activities of TiO2/Pt/glass thin films are higher than that of TiO2/glass thin films. Also, a more higher photocatalytic activity of TiO2/Pt/glass thin films can be achieved when an anodic bias is applied, and it increses with the increase of anodic bias. Forthermore, light showed effects on the photocatalytic activity of the thin film.

Key words: photocatalysis, TiO2, photoelectrochemistry, film, sol-gel method

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