敏化对微弧氧化TiO_2膜光催化性能的影响  

Effects of Sensitization on Photocatalytic Activity of TiO_2 Films Using Micro-arc Oxidation

作　　者：宋恩军[1] 刘瑛[1] 

机构地区：[1]沈阳理工大学环境与化学工程学院,辽宁沈阳110168

出　　处：《电镀与精饰》2008年第5期1-3,共3页Plating & Finishing

基　　金：辽宁省自然科学基金(2040189)

摘　　要：采用微弧氧化法以磷酸钠为电解液在钛片上制备TiO2膜,通过对苯胺废水的光催化降解率来表征TiO2膜的光催化性能,采用溶胶-凝胶和敏化处理对TiO2膜进行改性。实验结果表明:用溴甲酚绿敏化溶胶-凝胶法负载两次的TiO2膜,当溴甲酚绿敏化剂的质量浓度为20 mg/L,pH为5,敏化时间为16 h,TiO2膜的光催化效率达到40.6%。Titanium oxide TiO2 coatings were prepared on the titanium surface by micro-arc oxidation （MAO） in Na3PO4 solution. The photocatalytic ability of the coatings were evaluated by photocatalytic degradation experiment of aniline aqueous solution. Then the coatings were modified by sol-gel method and sensitization. The result shows that the optimum condition is： twice TiO2 coatings by sol-gel method,the bromocresol green concentration of 20 mg/L, the pH of 5 and the sensitization time of 16 hours. The photocatalytic degradation rate of TiO2 films is 40.6% in this optimum condition.

关 键 词：微弧氧化 光催化 溶胶-凝胶法 敏化 TIO2膜 

分 类 号：TG174.451[金属学及工艺—金属表面处理]