Stepwise construction of Pt decorated oxygen-deficient mesoporous titania microspheres with core-shell structure and magnetic separability for efficient visible-light photocatalysis

作     者：Zhijian Li Yao Wang Ahmed A.Elzatahry Xuanyu Yang Shouzhi Pu Wei Luo Xiaowei Cheng Yonghui Deng Zhijian Li;Yao Wang;Ahmed A.Elzatahry;Xuanyu Yang;Shouzhi Pu;Wei Luo;Xiaowei Cheng;Yonghui Deng

作者机构：Department of ChemistryState Key Laboratory of Molecular Engineering of PolymersShanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsiChEMFudan University.Shanghai 200433China Jiangxi Key Laboratory of Organic ChemistryJiangxi Science and Technology Normal UniversityNanchang 330013China Materials Science and Technology ProgramCollege of Arts and SciencesQatar UniversityDoha PO Box 2713Qatar State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2020年第31卷第6期

页      面：1598-1602页

核心收录：

学科分类：081704[工学-应用化学] 081705[工学-工业催化] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：supported by the National Natural Science Foundation of China(Nos.51372041,51422202,21673048,21875044,51822202 and 51772050) Key Basic Research Program of Science and Technology Commission of Shanghai Municipality(No.17JC1400100) Youth Top-notch Talent Support Program of China,Shanghai Rising-Star Program(No.18QA1400100) DHU Distinguished Young Professor Program 

主　　题：Core-shell Mesoporous TiO2 Photocatalytic activity Magnetic recovery Visible light 

摘      要：Solid photocatalysts with high specific surface area,superior photoactivity and ease of recycling are highly desired in chemical process,water treatment and so *** this study,a facile stepwise sol-gel coating approach was utilized to synthesize Pt decorated oxygen-deficient mesoporous titania microspheres with core-shell structure and convenient magnetic separability(denoted as Fe3 O4@-SiO2@Pt/mTiO2-x).These photocatalysts consist of magnetic Fe3 O4 cores,nonporous insulating SiO2 middle layer and mesoporous anatase TiO2-x shell decorated by Pt nanoparticles(~3.5 nm)through wet impregnation and H2 *** a result of high activity of oxygen-deficiency of black TiO2-x by H2 reduction and efficient inhibition of electron-hole recombination by Pt nanoparticles,the rationally designed core-shell Fe3 O4@SiO2@Pt/mTiO2-x photocatalysts exhibit superior photocatalytic performance in rhodamine B(RhB)degradation under visible light irradiation,with more than 98%of RhB degraded within 50 *** core-shell structured photocatalysts show excellent recyclability under the assistance of magnetic separation with well-retained photocatalytic performance even after running five *** stepwise synthesis method paves the way for the rational design of a high-efficiency recyclable heterogeneous catalyst,including photocatalysts,for various applications.