文献类型：期刊文献

英文题名：A green template-assisted synthesis of hierarchical TS-1 with excellent catalytic activity and recyclability for the oxidation of 2,3,6-trimethylphenol

作者：Gao, Xiang[1];An, Jianguo[1];Gu, Jinlou[1];Li, Lang[1];Li, Yongsheng[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Lab Low Dimens Mat Chem,Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China

年份：2017

卷号：239

起止页码：381

外文期刊名：MICROPOROUS AND MESOPOROUS MATERIALS

收录：;EI(收录号：20164502998512);WOS:【SCI-EXPANDED(收录号:WOS:000389284300043)】；

基金：This work was financially supported by the National Natural Science Foundation of China (Grant Nos. 51132009, 51172070, 51472085, 5141101086); The Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Zeolites; Hierarchical TS-1; Ammonium-modified chitosan; Selective oxidation; Recyclability

摘要：A simple one-step hydrothermal synthetic strategy to nano-sized hierarchical TS-1 zeolite with randomly arranged mesopores of 26 nm in diameter and uniform crystal size of 200-300 nm has been developed by utilizing the green and cheap ammonium-modified chitosan (HTCC) as the mesopore directing agent. The obtained hierarchical TS-1 samples were comprehensively characterized by XRD, SEM, TEM, BET, XPS, and other techniques. It is demonstrated that the physicochemical and texural properties of the resultant hierarchical TS-1 can be tailored by simply adjusting the HTCC amounts. Furthermore, the catalytic activity was measured on the oxidation of large molecules 2,3,6-trimethylphenol to 2,3,5-p-benzoquinone with hydrogen peroxide as oxidant under the mild conditions. Due to the introduction of the mesoporosity into the crystals, the hierarchical TS-1 zeolite exhibits enhanced catalytic capability, 62.22% conversion of 2,3,6-trimethylphenol and 96.97% selectivity to 2,3,5-p-benzoquinone with excellent recyclability. This provides an efficient and green route to construct hierarchical TS-1 zeolites with potential applications on the catalytic oxidation of bulky organic molecules. (C) 2016 Elsevier Inc. All rights reserved.