Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (1): 74.doi: 10.7503/cjcu20200461

Special Issue: 分子筛功能材料 2021年,42卷,第1期

• Review • Previous Articles     Next Articles

Controllable Synthesis, Diffusion Study and Catalysis of Hierarchical Zeolites

ZOU Run1, DONG Xiao1, JIAO Yilai2, Carmine D'AGOSTINO1, YAN Wenfu3, FAN Xiaolei1()   

  1. 1.Department of Chemical Engineering and Analytical Science,School of Engineering,the University of Manchester,M13 9PL,United Kingdom
    2.Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China
    3.State Key Laboratory of Inorganic Synthesis and Preparative Chemistry,College of Chemistry,Jilin University,Changchun 130012,China
  • Received:2020-07-16 Online:2021-01-10 Published:2021-01-12
  • Contact: FAN Xiaolei E-mail:xiaolei.fan@manchester.ac.uk
  • Supported by:
    This paper is supported by the European Union’s Horizon 2020 Research and Innovation Programme(872102);the China Scholarship Council-The University of Manchester Joint Scholarship(201906740020);the Programme of Introducing Talents of Discipline to Universities of China(B17020);the National Natural Science Foundation of China(U1967215);the EPSRC New Investigator Award(EP/S019138/1);the Natural Science Foundation of Liaoning Province, China(2018010047-301);the National Key Research and Development Program of China(SQ2019YFE011366)

Abstract:

Hierarchical zeolites refer to zeolitic materials having bi-/multi-modal interconnective pores arranged in order of certain ranks, which improve the molecular diffusion within their frameworks, and hence the performance in their applications such as adsorption and heterogeneous catalysis. Hierarchical zeolites are commonly produced via the top-down post-synthetic treatments(such as dealumination and/or desilication) of pre-synthesized zeolites(i.e. the parent zeolites) and the bottom-up synthesis-by-design methods(such as soft/hard templating). This review presents the recent advances(mainly post 2000) in the strategies of making hierarchical zeolites, with the emphasis on the top-down approaches due to their relatively high practicality. Since hierarchical zeolites are proposed to improve intracrystalline diffusion, experimental studies of guest molecules diffusion in hierarchical zeolites are also reviewed. Additionally, catalytic applications of hierarchical zeolites, in comparison with the conventional microporous pristine zeolites, are also commented to highlight the advantages of hierarchical zeolites to improve catalysis.

Key words: Hierarchical zeolite, Post-synthetic treatment, Diffusion, Pulsed-field gradient nuclear magnetic resonance(PFG NMR), Catalysis

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