Synthesis of submicrometer-sized Sn-MCM-41 particles and their catalytic performance in Baeyer-Villiger oxidation

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• 作者：Na Chen (2)
  Yanqiu Jiang (1) (2)
  Wenjing Cheng (2)
  Kaifeng Lin (1) (2)
  Xianzhu Xu (2)
  
  2. Academy of Fundamental and Interdisciplinary Sciences ; Harbin Institute of Technology ; Harbin ; 150080 ; P. R. China
  1. State Key Laboratory of Urban Water Resource and Environment ; Harbin Institute of Technology ; Harbin ; 150090 ; P. R. China
  
• 关键词：Sn ; MCM ; 41 ; Submicrometer ; sized particles ; Shorter mesopore channel ; Baeyer ; Villiger oxidation
• 刊名：Chemical Research in Chinese Universities
• 出版年：2015
• 出版时间：February 2015
• 年：2015
• 卷：31
• 期：1
• 页码：138-143
• 全文大小：847 KB
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• 刊物主题：Chemistry/Food Science, general; Analytical Chemistry; Inorganic Chemistry; Organic Chemistry; Physical Chemistry;
• 出版者：Springer Berlin Heidelberg
• ISSN：2210-3171

文摘

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.