核壳型CoFe_2O_4/TiO_2磁载纳米光催化剂制备及性能(英文)  

Preparation and characterization of a novel core-shell structure CoFe_2O_4/TiO_2 magnetic nano-photocatalyst

作　　者：高帅[1] 李忠义[1] 张秀玲[1] 

机构地区：[1]大连大学物理科学与技术学院,大连116622

出　　处：《功能材料与器件学报》2009年第2期201-205,共5页Journal of Functional Materials and Devices

基　　金：Science and Technology project of educational department Liaoning Province(No.20060066);Science Fundproject of Dalian city(No.2005A10GX109)

摘　　要：采用化学共沉法和TiCl4水解法制备CoFe2O4磁粒子和核壳型CoFe2O4/TiO2光催化剂,在100℃烘干,350℃焙烧2h,在紫外光源和太阳光照射下所制备的CoFe2O4/TiO2光催化剂显示出较高的甲基橙降解能力,利用外加磁场很容易将CoFe2O4/TiO2光催化剂和所处理的污水分离,并可循环使用。TEM和XRD分析结果表明:CoFe2O4粒径约为20nm,TiO2包覆的CoFe2O4粒子的粒径约为30～40nm,TiO2包覆层约为10～20nm。The core -shell CoFe2O4/TiO2 magnetic nano -photocatalyst were prepared by hydrolysis of titanium tetrachloride precursor in the presence of the CoFe2O4 magnetic particles, and then be dried blew 100℃ and calcined at 350℃ for 2h. The prepared photocatalysts were easy to be separated from treated water by using an external magnetic field and shown high catalytic activity for the degradation of methyl orange in water under UV and visible -light irradiation. The morphology and the crystalline structure of the CoFe2O4/TiO2 were characterized by transmission electron microscopy （TEM） and X- ray diffraction （XRD）. The size of CoFe2O4 particles was about 20 nm. The diameter of CoFe2O4/TiO2 particles is in the range of 30 -40 nm. So the shell of TiO2 enwraps closely around the core and the thickness is in the range of 10 - 20 nm.

关 键 词：核壳型 CoFe2O4/TiO2 磁粒子 

分 类 号：TB44[一般工业技术]