Bi_2WO_6-NiFe_2O_4磁性可见光催化剂的制备及其性能研究  

Preparation and photocatalytic properties of magnetic Bi_2WO_6-NiFe_2O_4 visible-light photocatalyst

作　　者：李小娟[1] 汤端莲 汤帆[1] 何长发 

机构地区：[1]福州大学环境与资源学院,福州350108

出　　处：《功能材料》2015年第9期9106-9110,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(21407026);福建省自然科学基金计划资助项目(2012J05023)

摘　　要：采用水热法制备Bi2WO6-NiFe2O4磁性可见光催化剂。利用X射线衍射(XRD)、紫外-可见漫反射光谱(DRS)、扫描电子显微镜(SEM)和磁学性质测量系统(MPMS)对所合成材料进行分析和表征。最后以罗丹明B(RhB)为目标污染物,考察不同pH值条件下,Bi2WO6-NiFe2O4复合可见光催化剂对污染物的降解效率。结果表明,罗丹明B溶液pH值为5时,Bi2WO6-NiFe2O4具有最大降解效率2 h达98%。Bi2WO6-NiFe2O4在外加磁场下能快速的从溶液中分离。Magnetic Bi2WO6-NiFe2O4visible-light photocatalyst was successfully synthesized by a simple hydrothermal method.The as-prepared photocatalysts were characterized by X-ray diffraction(XRD),UV-Visible diffuse reflectance spectra(UV-Vis DRS),scanning electron microscopy(SEM)and magnetic property measurement system(MPMS).The photocatalytic activities of the photocatalyst were evaluated by degradation of Rhodamine B(RhB)in aqueous solution under visible light at different pH value.The results demonstrated that the highest RhB degradation rate(>98%)was achieved by Bi2WO6-NiFe2O4 photocatalyst when the pH was 5.Bi2WO6-NiFe2O4 photocatalyst can be easily separated from solution using an external magnetic field.

关 键 词：磁分离 NIFE2O4 Bi2WO6 光催化 

分 类 号：TQ13[化学工程—无机化工] O614[理学—无机化学]