在可见光照射下金属离子改性二氧化钛水溶胶对甲基橙的降解  

Degradation of Methyl Orange with Metal Ion Modified TiO_2 Hydrosol under Visible Light Irradiation

作　　者：陈超[1] 龙明策[2] 蔡伟民[1,2] 周慕琳[2] 周保学[1,2] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090 [2]上海交通大学环境科学与工程学院,上海200240

出　　处：《净水技术》2011年第2期50-54,共5页Water Purification Technology

基　　金：国家自然科学基金(20907031)

摘　　要：以钛酸四丁酯为前驱物,采用沉淀胶化法制备了TiO2水溶胶,比较了制备方法对TiO2水溶胶性能的影响,并用TiO2水溶胶制备薄膜。采用金属离子Fe3+[1]、Co2+和Ni2+对TiO2水溶胶进行改性,分析离子改性TiO2水溶胶的光吸收性能,发现金属离子与TiO2水溶胶形成了配位化合物。研究了金属离子改性对TiO2水溶胶可见光降解甲基橙活性的影响。结果表明金属离子改性TiO2水溶胶的光催化活性高于TiO2水溶胶,金属离子改性TiO2水溶胶和TiO2水溶胶对甲基橙的光催化降解均呈现自催化反应现象。TiO2 hydrosol was synthesized via precipitation-gelation method by using tetrabutyl titanate as reactants.Effect of synthesis method on photocatalytic activity of TiO2 hydrosol was studied.TiO2 hydrosol was used to prepare thin film.Metal ions（Fe^3＋,Co^2＋,and Ni^2＋） were used to modify TiO2 hydrosol,and the corresponding photoabsorption performance was analyzed.Coordination compounds were formed between metal ion and TiO2 hydrosol.Effect of metal ion under visible light photocatalytic activity of TiO2 hydrosol in degradation of methyl orange was studied.The results show that metal ion modified TiO2 hydrosol has higher photocatalytic activity on methyl orange.Degradation of methyl orange with TiO2 hydrosol and metal ion modified TiO2 hydrosol is a self-catalysis reaction.

关 键 词：二氧化钛水溶胶 金属离子 自催化 可见光 甲基橙 

分 类 号：TU992[建筑科学—市政工程]