高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (9): 1671.

• 论文 • 上一篇    下一篇

Fe3+-TiO2/SiO2薄膜催化剂的结构对其光催化性能影响

付宏刚1,2, 王建强1, 任志宇1, 闫鹏飞1,2, 于海涛1, 辛柏福1, 袁福龙1   

  1. 1. 黑龙江大学化学化工学院, 哈尔滨 150080;
    2. 哈尔滨工业大学应用化学系, 哈尔滨 150001
  • 收稿日期:2002-02-27 出版日期:2003-09-24 发布日期:2003-09-24
  • 通讯作者: 付宏刚(1962年出生),男,博士,教授,博士生导师,从事材料化学及理论化学研究.E-mail:fuhg@vip.sina.com E-mail:fuhg@vip.sina.com
  • 基金资助:

    国家自然科学基金(批准号:20171016,20271019);黑龙江省杰出青年科学基金(2002);教育部科学技术研究重点项目(2002);黑龙江省普通高等学校骨干教师创新能力资助计划(2001);黑龙江省自然科学基金(批准号:B00006)

Structure Influence of Fe3+Doped TiO2/SiO2Film on the Photocatalytic Properties

FU Hong-Gang1,2, WANG Jian-Qiang1, REN Zhi-Yu1, YAN Peng-Fei1,2, YU Hai-Tao1, XIN Bai-Fu1, YUAN Fu-Long1   

  1. 1. Institute of Chemistry and Chemical Engineering, Heilongjiang University, Harbin 150080, China;
    2. Department of Applied Chemistry, Harbin Institute of Technology, Harbin 150001, China
  • Received:2002-02-27 Online:2003-09-24 Published:2003-09-24

摘要: 以硅胶为载体,采用溶胶-凝胶法制备了掺杂不同量Fe3+的TiO2光催化剂(Fe3+-TiO2/SiO2),以氙灯为光源,罗丹明B为目标降解物,对其光催化活性进行了研究.结果表明,Fe3+-TiO2/SiO2比TiO2纳米粉有更好的催化活性,Fe3+的最佳掺入量为0.03%.罗丹明B在粉体和膜催化剂的作用下遵循不同的光催化反应机理.根据XRD,SEM,Raman,XPS和FTIR的表征结果可认为,TiO2在SIO2表面薄膜化和Ti-O-Si键的形成是催化活性提高和降解机理不同的主要原因.

关键词: Fe3+-TiO2/SiO2膜, 光催化降解, 反应机理, 罗丹明B

Abstract: Fe3+ion doped titanium dioxide films coated on silica(Fe3+-TiO2/SiO2) were prepared by sol-gel method. The obtained films were more effective than TiO2nano-size powder in decomposing Rhodamine Bunder irridation with Xe lamp. In the Fe3+doping system, the optimum value of the Fe3+/Ti4+(atomic ratio ) was 0. 03 % for the photocatalytic degradation of Rhodamin B. The experimental results suggested that the photocatalytic reactions with the titanium dioxide nanosize powder and film as the catalyst proceed in two different degradation mechnisms. By the characterization using XRD, SEM, Raman, and FTIR technologies, we can conclude that the surface layer structure of TiO2film on silica and the formation of Ti-O-Si bond play important roles with the increasing of degradation efficiency, and result in two different decomposition mechanisms for film and power.

Key words: Fe3+doped TiO2/SiO2film, Photocatalytic degradation, Reaction mechnism, Rhodamin B

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