磁性TiO_2/rGO-Fe_3O_4复合光催化剂的制备及性能研究  

Preparation and properties of magnetic TiO_2/rGO-Fe_3O_4 composite photocatalyst

作　　者：郭星[1] 孙婷[1] 于常武[1] 盛雨哲 贺奕博 王鑫 GUO Xing;SUN Ting;YU Chang-wu;SHENG Yu-zhe;HE Yi-bo;WANG Xin(College of Chemical and Environmental Engineering,Liaoning University of Technology,Jinzhou 121001,China)

机构地区：[1]辽宁工业大学化学与环境工程学院,辽宁锦州121001

出　　处：《应用化工》2018年第10期2135-2139,共5页Applied Chemical Industry

基　　金：辽宁省联合基金(201602374);辽宁省重大科技计划项目(2017229009)

摘　　要：以氧化石墨烯为原料,利用共沉淀法得到rGO-Fe_3O_4磁性载体,进而采用水热法制备出TiO_2与rGO-Fe_3O_4磁基体不同配比的磁性TiO_2/rGO-Fe_3O_4复合光催化剂,紫外光下催化降解甲基橙溶液,结果表明,石墨烯的引入可以扩宽TiO_2对可见光的光谱响应范围,在紫外光照射下,m(TiO_2)∶m(磁基体)=3∶1的磁性TiO_2/rGO-Fe_3O_4复合光催化剂的催化性能最佳,经120 min光照后,甲基橙降解效率高达94. 94%,重复循环使用5次后,降解率依然能达到90. 23%。Graphene oxide as raw material to prepare rGO-Fe 3O 4 magnetic matrix by a co-precipitation method,and TiO 2/rGO-Fe 3O 4 composite photocatalyst under different ratio of TiO 2 and rGO-Fe 3O 4 magnetic matrix was synthesized by a hydrothermal method.The photocatalytic degradation of methyl orange solution under ultraviolet light.The results show that the introduction of graphene can amplify the spectral response range of TiO 2 to visible light.Under UV irradiation,the magnetic TiO 2/rGO-Fe 3O 4 composite photocatalyst of m(TiO 2)∶m(magnetic matrix)=3∶1 has the best photocatalytic performance.The degradation efficiency is as high as 94.94%after 120 min light,and the degradation rate can reach 90.23%after repeated using five times.

关 键 词：磁性 二氧化钛 石墨烯 光催化 性能研究 

分 类 号：TQ610.9[化学工程—精细化工] X131.2[环境科学与工程—环境科学]