影像科学与光化学 ›› 2001, Vol. 19 ›› Issue (3): 202-207.DOI: 10.7517/j.issn.1674-0475.2001.03.202

• 研究简报 • 上一篇    下一篇

TiO2薄膜光催化氧化I-的研究

崔玉民, 单德杰, 朱亦仁   

  1. 阜阳师范学院化学系, 安徽阜阳236032
  • 收稿日期:2000-12-18 修回日期:2001-02-26 出版日期:2001-08-20 发布日期:2001-08-20
  • 通讯作者: 崔玉民(1964-),男,硕士,副教授,主要从事光催化、有机合成方面的研究及教学工作,通讯联系人.

A STUDY ON PHOTOCATALYTIC OXIDATION OF I-OVER A TiO2 THIN FILM

CUI Yu-min, SHAN De-jie, ZHU Yi-ren   

  1. Department of Chemistry, Fuyang Teacher’s College, Anhui Fuyang 236032, P. R. China
  • Received:2000-12-18 Revised:2001-02-26 Online:2001-08-20 Published:2001-08-20

摘要: 采用溶胶凝胶法,在玻璃珠表面涂覆均匀透明的TiO2薄膜并制成光催化反应器,对水溶液中I-的光催化氧化进行了研究.比较了光催化剂的活性,讨论了I-的起始浓度、试液的酸度、光照时间与I2产率的关系.实验结果表明:采用锐钛型TiO2作光催化剂(3L碘化钾溶液所用催化剂量为40g),当[I-]=0.3mol/L,[H+]=3.0mol/L,光照8h时,I2的产率达到41.26%.

关键词: 溶胶-凝胶法, 碘化物, 光催化剂, 二氧化钛, 光催化氧化

Abstract: Photocatalytic oxidation of I- in aqueous solution was studied in a photocatalytic reactor, in which the surface of the glass beads was covered with evenly transparent TiO2 thin film by sol gel process. It is observed that the yield of I2 formation is dependent on the crystal structure of the catalyst, the illumination time, the initial concentrations of I- and H+. The results show that the yield of I2 can reach 41.26% over anatase TiO2 coated film, with photocatalyst (4.0 g) in the solution of KI (3 L), of 0.3 mol/L, of 3.0 mol/L and illumination time of 8 h.

Key words: sol-gel process, iodide, photocatalyst, titanium dioxide, photocatalytic oxidation

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