Mesoporous TiO2 mixed crystals for photocatalytic pure water splitting

作     者：Lichao Wang Zhaozhong Xiao Ye Liu Shuang Cao Zhi Ma Lingyu Piao 王利超;肖召忠;刘叶;曹爽;马智;朴玲钰

作者机构：School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China CAS Key Laboratory of Standardization and Measurement for NanotechnologyCAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China School of Metallurgy and Chemical EngineeringJiangxi University of Science and TechnologyGanzhou 341000China 

出 版 物：《Science China Materials》 (中国科学（材料科学（英文版）)

年 卷 期：2020年第63卷第5期

页      面：758-768页

核心收录：

学科分类：081702[工学-化学工艺] 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(21703046) the Ministry of Science and Technology of China(2016YFA0200902) 

主　　题：mesoporous TiO2 mixed crystal photocatalytic water splitting hydrogen hydrogen peroxide 

摘      要：Semiconductor mesoporous single crystals have attracted considerable attention due to the merits of excellent light absorption ability and large surface area for photocatalysis ***,most of the materials have a relative large size(~um),which can hardly suppress the recombination of photogenerated electrons and *** this work,we synthesized a series of nano mesoporous TiO2 mixed crystals(brookite and rutile)with high carrier transfer efficiency,improved mass transfer and diffusion abilities,which are crucial for the outstanding photocatalytic ***,the key factors in the growth process and mechanism of the mesoporous TiO2 mixed crystals were *** the assistance of Pt nanoparticles,H2 and H2O2 production can be simultaneously achieved and the efficiencies can reach up to 9.46±0.56 and 3.29±1.28μmol mg^-1 h^-1,*** H2 evolution rate is 2.8-fold higher than that of the reported TiO2 nanoparticle catalyst(3.34μmol mg^-1 h^-1).The excellent photocatalytic efficiency can be attributed to the special mixed crystal structure of the mesoporous TiO2 *** work provides new ideas and guidance for precise synthesis of nano mesoporous TiO2 mixed crystals and enhancing their water splitting performance with high value-added products.