三维有序大孔CdS/TiO_2薄膜的制备及其可见光催化性能  

Preparation and visible light catalytic activity of three-dimensional ordered macroporous CdS/TiO_2 films

作　　者：陈晓芳[1] 张佳[1] 霍宇凝[1] 李和兴[1] 

机构地区：[1]上海师范大学化学系,上海200234

出　　处：《催化学报》2013年第5期949-955,共7页

基　　金：国家自然科学基金(20937003;21261140333;21237003;21207091);上海市科委项目(11JC1409000;12230706000);上海市教委创新项目(12YZ091)~~

摘　　要：采用胶体晶体模板辅助溶胶-凝胶法以及S2–离子交换法合成了三维有序大孔CdS/TiO2膜.结果表明,该薄膜材料在可见光催化降解污染水中罗丹明B和对氯苯酚的反应中表现出高活性.这可归因于修饰剂CdS的光敏化作用实现可见光催化,CdS-TiO2之间形成了异质结,促进了电子和空穴的分离;另一方面,有序大孔结构有利于光的利用以及反应物的扩散和吸附.A three-dimensional ordered macroporous CdS/TiO2 film was prepared by the sol-gel method with a colloidal crystal template and S2– ion exchange, and it exhibited high visible light photocatalytic activity for the aqueous degradation of rhodamine B and 4-chlorophenol. The modification with CdS gave visible light absorption by photosensitization and better separation of photo-induced electrons and holes. The ordered macroporous structure gave higher light utilization and faster reactant transport.

关 键 词：硫化镉/二氧化钛薄膜 三维有序大孔结构 可见光 光催化 

分 类 号：O643.32[理学—物理化学]