Fe掺杂ZnO/TiO_(2) 光催化性能  

Photocatalytic Performance of Fe-doped ZnO/TiO_(2)

作　　者：刘龙双 唐先进[2] 陈胡星[1] LIU Longshuang;TANG Xianjin;CHEN Huxing(School of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,China;Institute of Soil and Water Resources and Environmental Science,Zhejiang Key Laboratory of Agricultural Resources and Environment,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]浙江大学材料科学与工程学院,浙江杭州310027 [2]浙江大学浙江省农业资源与环境科学重点实验室水土资源与环境科学研究所,浙江杭州310058

出　　处：《材料科学与工程学报》2022年第2期232-238,310,共8页Journal of Materials Science and Engineering

摘　　要：采用溶胶-凝胶法制备了Fe掺杂ZnO/TiO_(2)纳米催化剂粉体,利用多种技术手段对样品的组成、形貌、表面化学态、光学性能等进行表征分析,同时通过降解甲基橙溶液来评价样品的光催化性能。研究结果表明,掺杂Fe能稳定ZnO/TiO_(2)的锐钛矿相,细化催化剂颗粒,并且促进光的吸收带隙红移。Fe-ZnO/TiO_(2)的光催化活性相比TiO_(2)显著增强,当Fe掺杂量为1.5%时,光催化活性较为理想。光催化性能的提升可归结为Fe抑制因Zn取代Ti引起的锐钛矿相变,Fe作为电子捕获中心延长光生电子-空穴寿命,以及Fe掺杂引起ZnO/TiO_(2)能带结构改变。Fe-doped ZnO/TiO_(2)was prepared by sol-gel method,and the composition,morphology,surface chemical state and optical properties of the sample were characterized and analyzed by various technical means.At the same time,the photocatalytic performance of the sample was evaluated by degrading methyl orange solution.The research results show that the doped Fe stabilizes anatase phase,refines its particles,and leads to the redshift in the band gap in absorption spectra.Fe-doped ZnO/TiO_(2)significantly improved the degradation efficiency of methyl orange under visible light.When the doping concentration of Fe is 1.5%,it exhibits the best photocatalytic activity.The improvement of photocatalytic properties can mainly be attributed to the following three aspects:Fe suppresses anatase phase transition caused by the replacing of Ti in the TiO_(2)lattice by Zn.Fe acts as electron capture center to prolong the lifetime of photogenerated electron-hole.The energy band gap of ZnO/TiO_(2)is changed by doping Fe ions.

关 键 词：FE ZnO/TiO_(2) 掺杂 光催化 

分 类 号：TQ426.7[化学工程]