催化学报

催化学报 ›› 2010, Vol. 31 ›› Issue (1): 120-125.

• 研究论文 • 上一篇    下一篇

氟掺杂纳米 TiO2 薄膜的低温制备及其光催化性能

陈艳敏, 钟晶, 陈锋, 张金龙   

  1. 华东理工大学精细化工研究所, 结构可控先进功能材料及其制备教育部重点实验室, 上海 200237
  • 收稿日期:2010-01-25 出版日期:2010-01-25 发布日期:2010-01-25

Low-Temperature Preparation and Photocatalytic Performance of F-Doped Nanosized TiO2 Thin Film

CHEN Yanmin, ZHONG Jing, CHEN Feng*, ZHANG Jinlong   

  1. Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, Shanghai 200237, China
  • Received:2010-01-25 Online:2010-01-25 Published:2010-01-25

PDF

1165

被引次数

129

摘要： 以氟化铵为氟源, 采用水热法制得氟掺杂 TiO2 (FTO) 溶胶, 并通过浸渍提拉法在低温下制备了 FTO 薄膜. 其中在 120 oC 下水热处理 10 h 所得的 TiO2 溶胶制备的薄膜均匀透明, 具有较高的光催化活性. 氟掺杂后的 TiO2 晶粒尺寸并未发生明显变化, 但薄膜的光催化活性显著升高. F/Ti 摩尔比为 0.01 时, FTO 薄膜的光催化活性最高, 比 TiO2 薄膜的活性升高了 23%. X 射线光电子能谱结果表明, 氟掺杂 TiO2 中的氟离子存在晶格取代掺杂和表面化学吸附两种形式. 这两种氟离子的共同作用是 FTO 薄膜光催化活性升高的主要原因.

关键词: 氟, 掺杂, 二氧化钛, 薄膜, 光催化, 罗丹明 B, 降解

Abstract: F-doped TiO2 (FTO) sol was prepared using NH4F as the fluorine precursor by a hydrothermal method. FTO thin film was then prepared via dip-coating. The TiO2 thin film prepared from the TiO2 sol that was hydrothermally treated at 120 oC for 10 h had preferable transparence and high photocatalytic activity. F doping did not significantly change the grain size of TiO2 but greatly enhanced the photocatalytic activity of the TiO2 film. The optimal doping concentration of F corresponded to F/Ti molar ratio of 0.01. The photocatalytic activity of the FTO thin film was 23% higher than that of TiO2 thin film. X-ray photoelectron spectroscopy results showed that there were two forms of F element in the FTO thin film: surface chemically adsorbed F and substituent lattice F. Both surface adsorbed F and substituent lattice F played a role in the photocatalytic activity enhancement of the FTO thin film.

Key words: fluorine, doping, titanium dioxide, thin film, photocatalysis, rhodamine B, degradation