Synthesis of Submicrometer-sized Sn-MCM-41 Particles and Their Catalytic Performance in Baeyer-ViUiger Oxidation

作     者：CHEN Na JIANG Yanqiu CHENG Wenjing LIN Kaifeng XU Xianzhu 

作者机构：State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Harbin 150090 P. R. China Academy of Fundamental and Interdisciplinary SciencesHarbin Institute of Technology Harbin 150080 P. R. China 

出 版 物：《Chemical Research in Chinese Universities》 (高等学校化学研究（英文版）)

年 卷 期：2015年第31卷第1期

页      面：138-143页

核心收录：

学科分类：081702[工学-化学工艺] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

基　　金：Supported by the National Natural Science Foundation of China(No.21303031)  the Natural Science Foundation of Heilongjiang Province of China(No.B201010)  the Open Project of State Key Laboratory of Urban Water Resource and Environment of HIT  China(No.QA201021)  the Fundamental Research Funds for the Central Universities  China(No.HIT. NSRIF. 2013058)  the Talent Program for Innovation of Science and Technology of Harbin City  China(No.2013RFQXJ004) and the China Postdoctoral Science Foundation(Nos.2012T50334  20100480991) 

主　　题：Sn-MCM-41 Submicrometer-sized particle Shorter mesopore channel Baeyer-Villiger oxidation 

摘      要：Submicrometer-sized tin-containing MCM-41 particles with a size of several hundred nanometers（Sn-MCM-41/SMPs） were rapidly prepared with tin chloride as tin source and tetraethyl orthosilicate as silicon source via a dilute solution route in sodium hydroxide medium at room temperature. The characterization results show the highly ordered hexagonal mesopores and tetrahedral Sn species in Sn-MCM-41/SMPs. The material proved to be active and selective for Baeyer-Villiger oxidation of adamantanone with aqueous H2O2. Notably, Sn-MCM-41/ SMPs displayed a higher initial reaction rate and turnover number（TON） than common micrometer-sized Sn-MCM-41 large particles（Sn-MCM-41/LPs）, mainly attributed to the accelerated diffusion of the reactants and enhanced accessibility to the catalytic Sn species via shorter mesopore channels in Sn-MCM-41/SMPs. Furthermore, Sn-MCM-41/SMPs could be reused without the loss of activity after five runs, indicating that Sn active sites in the submicrometer-sized particles are remarkably stable. The study shows that decreasing particle size of Sn-MCM-41 in submicrometer scale is an effective way to achieve catalysts for Baeyer-Villiger oxidations with improved catalytic performance.