| TiO2薄膜光催化氧化I-的研究 |
| Studies on Photocatalytic Oxidation of I- over TiO2 Thin Film |
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| 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4.0g,[I-]=0.3mol·L-1,[H+]=3.0mol·L-1,光照8h时,I |
| 关键词: 溶胶-凝胶法 碘化物 光催化剂 二氧化钛 光催化氧化 |
| 基金项目: 安徽省教委自然科学基金资助项目(No.99j10162). |
| Abstract: In this article, photocatalytic oxidation of I- in aqueous solution has been studied with a photocatalytic glass reactor.The using catalyst is made of the glass beads as the carrier, and on the surface of every bead an evenly transparent TiO2 thin film was covered by the sol-gel process.It has been 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(4.0g) in the solution of KI(3L), [I-] of 0.3mol· L-1, [H+] of 3.0mol·L-1 and illumination time of 8h. |
| Keywords: sol-gel process iodide photocatalyst titanium dioxide photocatalytic oxidation |
| 投稿时间：2001-01-08 修订日期：2001-04-23 |
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| 崔玉民,单德杰,朱亦仁.TiO2薄膜光催化氧化I-的研究[J].无机化学学报,2001,17(3):401-406. |
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