CoFe_2O_4,CoFe_2,CoFe_2/CoFe_2O_4磁性粒子合成与光催化应用  

The synthesis of CoFe_2O_4,CoFe_2,CoFe_2/CoFe_2O_4 and their applications in photocatalysis

作　　者：马永青[1] 孙筱雨 祝翔 阮奕然 

机构地区：[1]安徽大学物理与材料科学学院,安徽合肥230601

出　　处：《安徽大学学报（自然科学版）》2018年第1期54-60,共7页Journal of Anhui University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51471001)

摘　　要：用水热法结合溶胶凝胶法制备4种磁催化剂材料,并用X射线衍射、透射电子显微镜、超导量子干涉仪和紫外-可见谱仪研究它们的结构、形貌、磁性及对污染物亚甲基蓝的催化降解性能,目的是获得具有强磁性的催化剂材料,便于水处理后的回收利用.4种磁载催化剂材料中,催化性能最好的样品在150 min内能去除水中84%的亚甲基蓝污染物;CoFe_2/TiO_2有较高的降解效率(72%),且有很好的磁分离能力.分析认为,催化性能与粒子大小、界面成分、结晶性、TiO_2与磁性粒子的比例有关,是多种因素的协同效应.Four kinds of magnetic catalysts were synthesized by a hydrothermal method combining with the sol-gel method, and were investigated by means of X-ray diffraction, transmission electron microscopy, superconducting quantum interference device and UV-Vis spectrometer, for the purpose of obtaining a strongly magnetic catalyst, beneficial for the reuse after the water treatment. Among four catalysts, the catalyst with the best photocatalytic performance could degrade 84% methylene blue pollutant in water. CoFe2/ TiO2 had the high degradation efficiency of 72%; meanwhile it had the good magnetic separability. It could be suggested through analysis that the photocatalytie performance relates to the particle size, interface compositions, crystallinity and the ratio between TiO2 and magnetic particles, which synergistically affected the photocatalytic performance.

关 键 词：磁性粒子 TIO2 光催化 磁分离 

分 类 号：TQ11[化学工程—无机化工]