磁性纳米Fe3O4与Fe3O4/TiO2复合材料的制备  

SYTHESIS OF MAGNETIE NANOMETER Fe_3O_4 POWDER AND Fe_3O_4/TiO_2 COMPOSITE MATERIAL

作　　者：梁翠芬[1] 熊予莹[1] 初本莉[1] 肖化[1] 

机构地区：[1]华南师范大学物理与电信工程学院,广东省高等学校量子信息技术重点实验室,广东广州510631

出　　处：《华南师范大学学报（自然科学版）》2010年第2期63-66,共4页Journal of South China Normal University(Natural Science Edition)

基　　金：广东省自然科学基金资助项目(8151063101000030)

摘　　要：用共沉淀法制备了纳米Fe3O4.TEM及XRD的测定结果表明制备了尖晶石型纳米Fe3O4,VSM结果显示样品具有超顺磁性.在此基础上采用均匀沉淀法制备了Fe3O4/TiO2复合材料,XRD和UV-Vis结果表明制备出双层封闭结构的复合粒子的光吸收带发生了较大幅度的红移,并进入可见光区,同时吸收光强度也明显增大,这对开发日光型催化剂是十分有利的.Chemical co-precipitation was selected as the preparation methods of magnetic nanoparticles Fe3O4.XRD and TEM pictures showed that Fe3O4 particles obtained were well crystallized cubic particles with high purity.VSM showed that the Fe3O4 nanoparticles were paramagnetic.Further more,the Fe3O4 /TiO2 composite material,which prepared by means of the homogenous precipitation coating technique,is studied.Its structure and optical properties are characterized by XRD and UV-Vis.The results indicate that TiO2 coating on the surface of Fe3O4 is equable.The Fe3O4 /TiO2 composite material has a large red shift of absorption band edge into the visible light.The absorbance increases apparently at the same time,which is favorable for the development of daylight catalyst.

关 键 词：磁性纳米材料 共沉淀法 FE3O4 TIO2 

分 类 号：TB33[一般工业技术—材料科学与工程] TB383