SnO_2/Fe_3O_4磁性光催化微纳米材料的制备与性能研究  

Preparation and Characterization of Magnetic Micro-nanometer SnO_2/Fe_3O_4 Photocatalytic Material

作　　者：马晓春[1] 徐广飞[1] 胡建成[1] 

机构地区：[1]浙江工业大学机械工程学院,杭州310014

出　　处：《材料导报》2012年第20期78-80,88,共4页Materials Reports

基　　金：浙江省自然科学基金(Y4110505)

摘　　要：以磁性纳米颗粒Fe3O4为核,SnCl4.5H2O、氨水、无水乙醇为原料,采用液相共沉淀法在Fe3O4表面包覆一层SnO2光催化剂。采用X射线衍射仪(XRD)及扫描电镜(SEM)分析了其成分和表面形貌。结果显示:Fe3O4纳米颗粒在实验过程中发生了团聚,尺寸增大;当Fe3O4与SnCl4.5H2O物质的量比为(1∶2)～(1∶4)时,SnO2能被较好地包覆在Fe3O4表面,形成核-壳结构的SnO2/Fe3O4复合光催化材料;600℃热处理能够形成结晶性良好的SnO2晶体,但此时Fe3O4转变为Fe2O3,失去了磁性。A composite photocatalyst （SnO2/FeaO4 ）was synthesized by liquid-state co precipitation method using magnetic nano Fea 04 particles as cores, SnCI4 ·5H2O, ammonia water and anhydrous alcohol as raw materials. The composition and microstructure of SnO2/Fe3O4 were characterized by means of XRD and TEM. The results show that the size of Fea 04 was amplify because of accumulation during the reaction; the SnO2 can be coated on the surface of magnetic Fe3O4 cores preferably when the mole ratio of Fe3 04 to SnCl4 · 5H2O was （1 = 2） （ 1 ： 4） ; the SnO2 crystal can be acquired preferably at the heating temperature of 600℃, but the magnetic Fe3O4 cores turned into Fe2 O3 and lost magnetic property absolutely at the same time.

关 键 词：光催化SnO2 FE3O4 共沉淀法 包覆SnO2 光催化剂 

分 类 号：TQ139[化学工程—无机化工]