Fe_3O_4@mSiO_2核壳光催化剂设计及还原CO_2研究  

Preparation and photo-catalyst performance of Fe_3O_4@ mSiO_2 magnetic microsphere composites

作　　者：刘蕊 别永超 刘涛 宋应金 宋克涵 LIU Rui;BIE Yong-chao;LIU Tao;SONG Ying-jin;SONG Ke-han(School of Science,Harbin University of Comnleree,Harbin 150076,China;Department of Chemistry,Harbin College,Harbin 150086,China)

机构地区：[1]哈尔滨商业大学理学院,哈尔滨150076 [2]哈尔滨学院化学系,哈尔滨150086

出　　处：《哈尔滨商业大学学报（自然科学版）》2018年第6期723-726,共4页Journal of Harbin University of Commerce：Natural Sciences Edition

基　　金：哈尔滨市科技创新青年后备人才项目(2017RAQXJ043);黑龙江省教育厅青年创新人才项(UNPYSCT-2018132);中国博士后基金(2017M611354);黑龙江省博士后基金(NO.LBH-Z16045)

摘　　要：以水热法制备的Fe_3O_4纳米颗粒,正硅酸乙酯(TEOS)为前驱体合成了SiO_2包覆Fe_3O_4磁性复合材料.采用XRD、N_2吸脱附、VSM、SEM和TEM对所合成复合材料的物相结构、形貌和磁性等性能做测试分析.研究结果表明,所合成的材料呈球形,粒径分布均一,材料的比表面积为415.55m^2·g^(-1).同时探究了该材料对光催化还原CO_2的催化性能,甲烷转化率最高可达0.5mmol/g.The SiO2 encapsulated Fe3O4 composite magnetic microsphere was synthesized by amodified Stober method with Fe3O4 nanoparticles as cores. The structures and properties ofthe composite were characterized by XRD, SEM, TEM, VSM and N2 absorption - desoqo-tion. The results showed that the as -prepared magnetic microspheres exhibited a sphericalshape and uniform particle size distribution. This material possessed a BET surface area of415.55m2 · g-1 Meanwhile, this paper investigated the photocatalytic reduction of CO2 per-formance, which showed the best methane conversion achieve at 0. 5 mmol/g.

关 键 词：核壳结构 复合微球 二氧化硅 FE3O4纳米颗粒 光催化剂 还原CO2 

分 类 号：X511[环境科学与工程—环境工程]