溶剂热法制备BiFeO_3基纳米颗粒光催化剂及其性能  

Solvothermal Synthesis and Properties of BiFeO_3 Based on Composite Nanoparticle Photocatalysts

作　　者：丛日敏[1] 于怀清[1] 罗运军[2] 王华[1] 王卫伟[1] 李秋红[1] 司维蒙 孙武珠 

机构地区：[1]山东理工大学材料科学与工程学院,淄博255049 [2]北京理工大学材料科学与工程学院,北京100081

出　　处：《无机化学学报》2017年第12期2241-2246,共6页Chinese Journal of Inorganic Chemistry

基　　金：山东省高等学校科技计划项目(No.J11LD12);山东省自然科学基金(No.ZR2011BL006;ZR2010BM011;ZR2015BM02);山东理工大学青年教师发展支持计划项目资助

摘　　要：以聚酰胺-胺(PAMAM)树形分子为稳定剂,采用溶剂热法制得了纯相BiFeO_3纳米颗粒(A)和BiFeO_3/Bi_(25)FeO_(40)/Fe_2O_3复合纳米颗粒(B),并采用HRTEM、XRD、UV-Vis、SQUID对其结构和性能进行了表征。2种颗粒结晶良好,粒径小于10 nm,能有效光催化降解亚甲基蓝,磁性回收率分别为74.6%(A)和90.2%(B)。BiFeO_3/Bi_(25)FeO_(40)/Fe_2O_3复合纳米颗粒的光催化与磁性能均优于纯相BiFeO_3纳米颗粒,是因为复合纳米颗粒含有多种相,相界面存在异质结构有利于光生载流子的分离和迁移,并且对可见光的吸收能力更强。Pure BiFeO3 nanoparticles （A） and BiFeO3/Bi25FeO40/Fe2O3 composite nanoparticles （B） were synthsized through solvothermal porcess by using polyamidoamine （PAMAM） dendrimer as stabilizer. The structure, mophology and properties of the samples were characterized by XRD, HRTEM, UV-Vis and SQUID. These particles are uniform balls with the diameter less than 10 nm. Methylene blue can be effectively degradated by these nanoparticles, and the recovery of photocatalysts are 74.6% （A） and 90.2%（B） in the magnetic field generated by magnets. Both the photocatalytic activity and saturation magnetization of BiFeO3/Bi25FeO40/Fe2O3 composite nanopartcles are higher than that of pure BiFeO3 nanopartcles. These differences are derived from the more phases, the heterogeneous structure of the phase boundary, and the higher absorption ability of visible light of BiFeO3/Bi25FeO40/Fe2O3 composite nanopartcles.

关 键 词：BIFEO3 Bi25FeO40 复合纳米颗粒 PAMAM树形分子 光催化剂 

分 类 号：O643[理学—物理化学]