磁场对制备TiCo_xO_(2+x)光催化剂结构和催化性能的影响  

The effect of magnetic field on the structure and catalytic activity of TiCo_xO_(2+x) photocatalyst

作　　者：李道荣[1] 张坤峰[1] 尹棋亚[1] 胡长文[2] 

机构地区：[1]河南工业大学化学化工学院,河南郑州450001 [2]北京理工大学理学院化学系,北京100081

出　　处：《功能材料》2010年第6期1071-1073,1078,共4页Journal of Functional Materials

基　　金：河南省科技攻关资助项目(0624210001);河南省重点科技攻关资助项目(07210220001)

摘　　要：在外加磁场条件下,采用溶胶-凝胶法制备了Co2+掺杂TiO2光催化剂,并利用可见光下降解甲基橙溶液的实验考察了磁场强度对光催化剂催化性能的影响。借助XRD、SEM、UV及PL等手段对掺杂催化剂进行了表征。结果表明,外加磁场使催化剂的粒径减小,颗粒分布均匀,降低了催化剂的带隙能,提高了电子空穴对分离效率,增大了光催化活性。A Co-doped TiO2 photocatalyst was prepared by sol-gel method under magnetic field and characterized by XRD,SEM,UV-Vis,and PL techniques.The effect of external magnetic field on the degradation of aqueous methyl orange was evaluated under visible light irradiation.The results revealed that the photocatalyst exhibited enhanced visible-light photocatalytic activity under magnetic field.The method not only decreased crystalline size of modified TiO2 and distributed particles uniformity,but also reduced the band gap of the catalyst and improved the separation efficiency of the electron-hole pairs.

关 键 词：TIO2 Co^2+掺杂 光催化 

分 类 号：O643[理学—物理化学] X703[理学—化学]