物理化学学报 >> 2007, Vol. 23 >> Issue (05): 765-768.doi: 10.3866/PKU.WHXB20070528

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光电流法研究TiO2薄膜表面吸附氧对光催化活性的影响

武伦鹏; 赵莲花; 张海明; 赵青南   

  1. 延边大学长白山天然资源与功能分子教育部重点实验室, 吉林 延吉 133002; 武汉理工大学硅酸盐材料工程教育部重点实验室, 武汉 430070
  • 收稿日期:2006-10-25 修回日期:2006-12-22 发布日期:2007-04-28
  • 通讯作者: 赵莲花 E-mail:zhaolh03@yahoo.com.cn

Effects of the Adsorption of Oxygen on the Photocatalytic Activity of TiO2 Films Using PhotocurrentMethod

WU Lun-Peng; ZHAO Lian-Hua; ZHANG Hai-Ming; ZHAO Qing-Nan   

  1. Key Laboratory of Organism Functional Factors of the Changbai Mountain of the Ministry of Education, Yanji 133002, Jilin Province, P. R. China; Key Laboratory of Silicate Materials Science and Engineering of the Ministry of Education, Wuhan University of Technology, Wuhan 430070, P. R. China
  • Received:2006-10-25 Revised:2006-12-22 Published:2007-04-28
  • Contact: ZHAO Lian-Hua E-mail:zhaolh03@yahoo.com.cn

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摘要： 采用溶胶-凝胶法制备了锐钛矿型和金红石型TiO2薄膜, 利用光电流和XPS技术研究了薄膜表面吸附氧对不同晶型TiO2光催化活性的影响. 并通过降解纯的环己烷溶液的实验来评估不同晶型TiO2的光催化活性. 结果表明, 在相同条件下, 锐钛矿型TiO2比金红石型具有明显的光催化活性. 这是由于锐钛矿型TiO2比金红石型TiO2具有较强的吸附氧的能力, 同时其光生电子与空穴的复合率相对较小所致.

关键词: 溶胶-凝胶法, TiO2薄膜, 光电流, 光催化

Abstract: TiO2 thin films (anatase and rutile) were prepared on soda-lime glass substrates by sol-gel method. The effects of adsorbed oxygen on the photocatalytic activity of different TiO2 crystals were studied by photocurent measurement and XPS technology. The photocatalytic activity of the different TiO2 crystals (anatase and rutile) was evaluated by the degradation of cyclohexane. The results showed that anatase was more active than rutile, which was attributed to the higher capability of adsorbing oxygen and lower electron-hole recombination rates of the anatase.

Key words: Sol-gel method, TiO2 thin film, Photocurrent, Photocatalysis

MSC2000: 

  • O643