微波辅助合成BiOBr/CeO_2及其光催化性能  

Microwave-assisted synthesis of BiOBr/CeO_2 and its excellent photocatalytic performance

作　　者：张淑娟[1] 汪东远 

机构地区：[1]天津科技大学理学院,天津300457 [2]天津科技大学材料科学与化学工程学院,天津300457

出　　处：《天津工业大学学报》2015年第5期27-31,共5页Journal of Tiangong University

基　　金：天津市应用基础与前沿技术研究计划一般项目(14JCYBJC20500)

摘　　要：采用微波辅助合成法得到了新型异质结构催化剂BiOBr/CeO2;采用扫描电镜(SEM)、X射线衍射(XRD)、紫外可见吸收光谱(UV-vis)和荧光光谱(PL)等手段对所制备的催化剂进行了表征.在可见光下,对有机物染料罗丹明B(RhB)的光催化降解实验表明,BiOBr/CeO2比纯BiOBr和CeO2的光催化性能有明显的提高;提出复合催化剂活性的提高是因为BiOBr和CeO2之间形成了独特的异质结构,有效地提高了光生电子与空穴的分离效率.The novel heterostructure photocatalyst of BiOBr/CeO2 are prepared by a microwave-assisted route. The prepared photocatalysts were characterized by TEM, XRD, UV-vis and PL, respectively. The as-prepared composites exhibit stronger photocatalytic activity than pure BiOBr and CeO2 in degradation of rhodamine B （RhB） under the visible light irradiation. The enhanced photocatalytic activities could be mainly attributed to the formation of a heterojunction structure between BiOBr and CeO2, and higher separation efficiency of photo-induced electrons and holes.

关 键 词：微波辅助合成 BiOBr/CeO2 光催化性能 可见光 罗丹明B 

分 类 号：TQ426[化学工程] O644[理学—物理化学]