[an error occurred while processing this directive]

高等学校化学研究 ›› 2022, Vol. 38 ›› Issue (1): 50-57.doi: 10.1007/s40242-021-1272-6

• Articles • 上一篇    下一篇

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

XU Wenjing1, LI Li1, ZHANG Tianjun1, YU Jihong1,2   

  1. 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
  • 收稿日期:2021-07-15 修回日期:2021-08-10 出版日期:2022-02-01 发布日期:2021-08-23
  • 通讯作者: ZHANG Tianjun, YU Jihong E-mail:caspian_zz@jlu.edu.cn;jihong@jlu.edu.cn
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (Nos.21835002, 21621001, 22001090), the "111" Project of China(No.B17020) and the China Postdoctoral Science Foundation(No.2021T140259).

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

XU Wenjing1, LI Li1, ZHANG Tianjun1, YU Jihong1,2   

  1. 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
  • Received:2021-07-15 Revised:2021-08-10 Online:2022-02-01 Published:2021-08-23
  • Contact: ZHANG Tianjun, YU Jihong E-mail:caspian_zz@jlu.edu.cn;jihong@jlu.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Nos.21835002, 21621001, 22001090), the "111" Project of China(No.B17020) and 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

Abstract: 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.

Key words: Post-treatment, Hierarchical zeolite, TS-1, Ti species, Epoxidation