Cr掺杂对尖晶石型CoFe_(2-x)Cr_xO_4的结构及光催化性能的影响  

Effect of Cr Doping on Structure and Photocatalytic Properties in Ferrite CoFe_(2-x)Cr_xO_4

作　　者：亓淑艳[1] 丁嘉宝[1] 司梦瑶[1] 任美婷[1] 

机构地区：[1]哈尔滨理工大学材料科学与工程学院,哈尔滨150080

出　　处：《材料导报》2012年第14期33-35,共3页Materials Reports

基　　金：国家大学生创新实验基金(101021409);黑龙江省教育厅科学技术研究项目(12511075);哈尔滨理工大学青年科学研究基金(2009YF008)

摘　　要：采用溶胶-凝胶法制备了尖晶石型铁氧体CoFe2-xCrxO4的系列样品,通过XRD、SEM对纳米颗粒的结构、形貌进行了表征。结果表明,所合成的样品均为尖晶石型,只是最高衍射峰的位置发生偏移,使得样品的结构从正交晶系向单斜晶系转变;未掺杂样品CoFe2O4的形貌呈立方颗粒状,粒径均匀,边长约为1μm,掺杂后的样品CoFeCrO4颗粒为圆球状,尺寸为100～200nm,且有明显团聚现象。通过测定样品对甲基橙的降解情况研究了其光催化活性,结果表明,经过B位Cr3+掺杂的CoFe2-xCrxO4样品,光催化活性明显提高。CoFe2-xCrxO4 ferrite with spinel structure were synthesized by sol-gel method. The size, structure and appearance of the synthesized nanoparticles were characterized by XRD and SEM. The results show that the asprepared CoFe2-xCrxO4 have unadulterated spinel structure,just position of tiptop diffract apex shift, demonstrating structure transition from orthorhombic to monoclinic. The morphologies of unadulterated CoFe2O4 are cubic grain and dispersive with the average size about 1μm in diameter. The morphologies of adulterated CoFeCrO4 are pellet grain with the average size about 100nm to 200nm, appear obvious reunite phenomenon. The photocatalyticaI activity of CoFe2-xCrxO4 samples was measured by the degradation of methylic orange, the results show that the B-site doping can improve the photocatalysis activity of CoFe2-xCrxO4.

关 键 词：尖晶石型铁氧体 光催化性能 甲基橙 

分 类 号：TQ138.1[化学工程—无机化工] TB32[一般工业技术—材料科学与工程]