Tailoring Porosity and Titanium Species of TS-1 Zeolites via Organic Base-assisted Sequential Post-treatment  

作　　者：XU Wenjing LI Li ZHANG Tianjun YU Jihong 

机构地区：[1]State Key Laboratory of Inorganic Synthesis&Preparative Chemistry,Jilin University,Changchun 130012,P.R.China [2]International Center of Future Science,Jilin University,Changchun 130012,P.R.China

出　　处：《Chemical Research in Chinese Universities》2022年第1期50-57,共8页高等学校化学研究（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China (Nos.21835002,21621001,22001090);the "111" Project of China(No.B17020);the China Postdoctoral Science Foundation(No.2021T140259).

摘　　要：The exploration of high-efficient catalysts based on hierarchical Ti-containing zeolites with optimized active titanium species distribution is of great value in enhancing the epoxidation of bulky olefins. Herein, hierarchical TS-1(MFI) zeolite with an extra-large external surface area(210 m2/g) and highly active octahedral- coordinated Ti species was prepared via organic base-assisted sequential post-treatment. Such a catalyst afforded a high turnover number value(TON, 114) in 1-octene epoxidation reaction, which was over twice than that(53) of the untreated conventional microporous TS-1 parent. According to the detailed characterization results, we revealed the hierarchical porosity construction effect of tetrapropylamonium hydroxide(TPAOH) treatment(first step) and the octahedral-coordinated Ti species fabrication effect of ethylamine(EA) treatment(second step) under hydrothermal condition. Such a facile post-treatment strategy reported in this work may provide guidance for the rational synthesis of TS-1 zeolite with enhanced catalytic activity.

关 键 词：POST-TREATMENT Hierarchical zeolite TS-1 Ti species EPOXIDATION 

分 类 号：O64[理学—物理化学]