文献类型：期刊文献

英文题名：Synthesis of mesoporous Beta and Sn-Beta zeolites and their catalytic performances

作者：Jin, Junjiang[1];Ye, Xinxin[2];Li, Yongsheng[1];Wang, Yanqin[2];Li, Liang[1];Gu, Jinlou[1];Zhao, Wenru[1];Shi, Jianlin[3]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Lab Low Dimens Mat Chem, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China;[3]Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

年份：2014

卷号：43

期号：22

起止页码：8196

外文期刊名：DALTON TRANSACTIONS

收录：;EI(收录号：20142117747735);WOS:【SCI-EXPANDED(收录号:WOS:000336254100012)】；

基金：This work was financially supported by the National Basic Research Program of China (973 Program, 2013CB933200); Program for New Century Excellent Talents in University (NCET-10- 0379); NSFC (grant no. 51172070, 51132009, 51202068); Shuguang Project (11SG30); and The Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Tin compounds - Mesoporous materials - Isomerization - Isomers - Zeolites - Chitosan - Chlorine compounds

摘要：Mesoporous Beta zeolite has been successfully prepared through hydrothermal synthesis in the presence of cationic ammonium-modified chitosan as the meso template. Through a subsequent solid-gas reaction between highly dealuminated mesoporous Beta zeolite and SnCl4 steam at an elevated temperature, mesoporous Sn-Beta has been facilely obtained. It was revealed that the addition of cationic chitosan induced the nanocrystal aggregation to particle sizes of similar to 300 nm, giving rise to the intercrystalline/interparticle mesoporosity. In the Sn-implanting procedure, Sn species were demonstrated to be doped into the framework of the resulting mesoporous Beta zeolite in a tetrahedral environment without structural collapse. Due to the micro/mesoporous structures, both mesoporous Beta and Sn-Beta exhibited superior performances in alpha-pinene isomerization, Baeyer-Villiger oxidation of 2-adamantanone by hydrogen peroxide and the isomerization of glucose in water, respectively.