催化剂BiFeO_3的制备及其光催化性能研究  

Preparation and Study of Photocatalytic Activity of BiFeO_3

作　　者：刘亚子[1] 杨绍贵[2] 

机构地区：[1]南京大学金陵学院化学与环境生物科学系,江苏南京210089 [2]污染控制与资源化国家重点实验室南京大学环境学院,江苏南京210093

出　　处：《环境监控与预警》2011年第4期42-46,共5页Environmental Monitoring and Forewarning

摘　　要：采用水热合成法制备了不同煅烧温度下的可见光催化剂BiFeO3粉体,并进行了结构和光催化性能的测试。利用X射线衍射、扫描电镜、傅里叶变换红外光谱和紫外-可见漫反射光谱方法对制备的粉体的晶相结构、表面形貌、光学特性等进行了表征。结果表明,500℃下制备的BiFeO3的晶相最纯、粒径最小、可见光吸收范围广、存在Fe—O键的弯曲振动和伸缩振动。通过对罗丹明B的降解反应证实了500℃制备的BiFeO3粉末具备最佳的光催化反应活性。Single-phase BiFeO3 powders were synthesized via hydrothermal process,by using Fe（NO3）3.9H2O as Fe resource and Bi（NO3）3.5H2O as Bi resource.The phase structure,micro-morphology,bond vibration and absorption range of visible light wavelength of as-prepared BiFeO3 powders were characterized by XRD,SEM,FTIR,UV-Vis.The results showed that the BiFeO3 powders synthesized in the calcination temperature of 500℃ were the ones with the purest phase structure,the smallest size and wider range of absorption of visible light.The stretching and bending vibration of Fe-O bonds indicated the presence of the octahedral FeO6 groups in the perovskite structure.The degradation of Rhodamine B showed BiFeO3 prepared at 500℃ were the best photocatalytic activity.

关 键 词：光催化 BIFEO3 罗丹明 水热合成法 

分 类 号：X506[环境科学与工程—环境工程]