Construction of hierarchically porous metal-organic framework particle by a facile MOF-template strategy--颗粒学报PARTICUOLOGY

Lan, T., Wang, Q., Lu, C., Li, J., Li, J., Chen, Y., . . . Li, J. (2023). Construction of hierarchically porous metal-organic framework particle by a facile MOF-template strategy. Particuology, 74, 9-17. https://doi.org/10.1016/j.partic.2022.05.004

Construction of hierarchically porous metal-organic framework particle by a facile MOF-template strategy

Tianhao Lan ^a, Qi Wang ^a, Chunyu Lu ^a, Jianhui Li ^a, Jinlong Li ^a, Yang Chen ^a, Libo Li ^a^b^*, Jiangfeng Yang ^a, Jinping Li ^{a b}

a College of Chemical Engineering and Technology, Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization, Taiyuan University of Technology, Taiyuan, 030024, China
b Key Laboratory of Coal Science and Technology, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan, 030024, China

10.1016/j.partic.2022.05.004

Volume 74, March 2023, Pages 9-17

Received 29 March 2022, Revised 7 May 2022, Accepted 8 May 2022, Available online 20 May 2022, Version of Record 30 May 2022.

E-mail: lilibo@tyut.edu.cn

Highlights

• A facile strategy was proposed for fabricating hierarchical pores in MOF pellets.

• Introduced tunable meso-/macropores in the shaped ZIF-8 spheres during the molding process.

• Pelletization with methyl cellulose binder endowed the pellets excellent mechanical stability.

• Adsorption kinetics and separation performance of HP-MOF pellets were improved significantly.

Abstract

Increasing the mass diffusion efficiency is a major challenge in the realm of metal-organic frameworks (MOFs). Construction of hierarchically porous, typically microporous MOF adsorbents or catalysts is crucial for enhancing both mass transfer and molecular accessibility. Many strategies have been proposed for the synthesis of hierarchically porous MOFs (HP-MOFs), with some striking results. In this paper, we proposed a facile and versatile strategy, termed the MOF-Template strategy, for fabricating hierarchical pores in MOF particle. The highly controlled crystalline sizes and morphologies of the unstable Cu-MOFs Cu₃(BTC)₂ and Cu(Qc)₂ have been exploited in their utilization as sacrificial agents by uniformly dispersing them during the shaping process of ZIF-8. Through a facile treatment with alkaline solution, tunable mesopores and macropores could be easily introduced in the shaped ZIF-8 spheres. This strategy could effectively improve the adsorption kinetics and separation productivity of MOF materials while maintaining high mechanical stability, offering promising prospects for industrial application.

Graphical abstract

Keywords

Metal-organic frameworks; Hierarchically porous; Shaping; Light hydrocarbon separation; Adsorption kinetic

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