Construction of hollow mesoporous silica nanoreactors for enhanced photo-oxidations over Au-Pt catalysts  

作　　者：Hao Tian Jinhui Zhao Xinyao Wang Lizhuo Wang Hao Liu Guoxiu Wang Jun Huang Jian Liu G.Q.(Max)Lu 

机构地区：[1]State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics(DICP),Chinese Academy of Sciences,Dalian 116023,China [2]Centre for Clean Energy Technology,School of Mathematical and Physical Sciences,Faculty of Science,University of Technology Sydney,Sydney,NSW 2007,Australia [3]Laboratory for Catalysis Engineering,School of Chemical and Biomolecular Engineering,Sydney Nano Institute,The University of Sydney,Sydney,NSW 2006,Australia [4]DICP-Surrey Joint Centre for Future Materials,Department of Chemical and Process Engineering and Advanced Technology Institute,University of Surrey,Guildford,Surrey GU27XH,UK [5]University of Surrey,Guildford,Surrey GU27XH,UK

出　　处：《National Science Review》2020年第11期1647-1655,共9页国家科学评论（英文版）

摘　　要：It is highly desirable to design hollow structures with multi-scale functions by mimicking cells for the construction of micro/nanoreactors.Herein,we report the construction of hollow-structured submicrometer-photoreactors with bimetallic catalysts loaded within mesoporous silicas.The synthesis parameters are optimized to study the evolution of hollow structure through hydrothermal treatment and an‘adhesive-contraction’formation mechanism is proposed.AuPt@HMZS catalysts exhibited a broader absorbance region under visible light and the adsorption edge displayed a red-shift,indicating the strong metal-metal interactions at the alloy interface.The reaction performance of the coupled Au-Pt catalysts can be tuned to achieve excellent catalytic activity in cinnamyl alcohol oxidation to cinnamic acid for 3.1 mmol g^-1 with 99%selectivity.The proposed strategy to build hollow structures as multifunctional micro/nanoreactors is promising for the design of high-performance and sustainable catalysts for chemical synthesis.

关 键 词：NANOREACTORS photocatalytic oxidation metal nanoparticles mesoporous materials surface plasmonic resonance 

分 类 号：O643.36[理学—物理化学]