光还原法制备增强光催化性能的Bi-TiO_2纳米管  

Photo-reduction method for the preparation of enhanced photocatalytic capability of Bi-TiO_2 nanotube

作　　者：肖昌仁 谭子俊 张国庆[1,2] 杜青平 杨晓青[1] 潘华耿[2] Xiao Changren;Tan Zijun;Zhang Guoqing;Du Qingping;Yang Xiaoqing;Pan Huageng(School of Materials and Energy Sources,Guangdong University of Technology,Guangzhou 510000,China;Shunde Dowell Technological ＆ Environmental Engineering Co.,Ltd.,Foshan 528300,China;School of Environmental Science and Engineering,Guangdong University of Technology,Guangzhou 510000,China)

机构地区：[1]广东工业大学材料与能源学院,广东广州510000 [2]佛山顺德都围科技环保工程有限公司,广东佛山528300 [3]广东工业大学环境科学与工程学院,广东广州510000

出　　处：《工业水处理》2018年第8期24-27,共4页Industrial Water Treatment

基　　金：国际科技合作计划(2011DFB91560);广东省科技计划(2012B050200002;2013B020600007;2015A020215031)

摘　　要：采用阳极氧化法及简易光沉积法制备了一种Bi-TiO_2纳米管(Bi-TNAs)光催化剂,并对其形貌、晶相以及光吸收性能进行表征。结果显示,薄片状的金属相Bi微米片成功沉积在TiO_2纳米管阵列表面。光催化降解罗丹明B实验显示,Bi-TNAs的光催化降解性能比TNAs显著增强。单质Bi微米片作为电子陷阱可捕获TiO_2的光生电子,延长载流子寿命,降低电子-空穴复合速率,增强TNAs光催化降解罗丹明B的活性。The Bi-TiO2 nanotube （Bi-TNAs） photocatalyst has been prepared via anodization process, and simple photo-deposition method. Its appearance, crystalline phase and optical absorption property have been characterized. The results reveal that the flaky Bi nano-sheet in metallic phase is successfully deposited on the surface of TiO2 nanotube arrays （TNAs）. The test on photoeatalytie degradation of RhB shows that the photo-catalytic degradation capability is significantly enhanced, compared with that of TNAs. Elemental Bi nano-sheet as an electronic trap can capture photo-generated electrons of TiO2, so as to prolong the life-time of current carrier, slow down electron-hole recombination rate and enhance the TNAs photoeatalytie degradation activity for RhB.

关 键 词：光催化 TIO2纳米管 阳极氧化 光还原 BI 

分 类 号：O643.36[理学—物理化学] X703[理学—化学]