A phase-transition ionic liquid endows COF-based mixed matrix membranes with efficient CO2 separation

Shuyu Guo; Jingrao He; Hailong Han; Rui Han; Junxi Shou; Chenxiang Ai; Ruiren Tang; Shuai Gu; Juntao Tang; Guipeng Yu

doi:10.1039/D5CC01328C

A phase-transition ionic liquid endows COF-based mixed matrix membranes with efficient CO₂ separation†

Shuyu Guo,^a Jingrao He,^a Hailong Han,^a Rui Han,^a Junxi Shou,^a Chenxiang Ai,^a Ruiren Tang,^a Shuai Gu,*^ab Juntao Tang

*^a and Guipeng Yu

*^a

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* Corresponding authors

^a Hunan Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha, China
E-mail: shaigu@csu.edu.cn

^b Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin 300071, China

Abstract

The interfacial compatibility of COF-based MMMs was significantly enhanced through the incorporation of thermoresponsive phase-transition ionic liquids. The IL@DAAQ-COF was synthesized in situ, with the ionic liquid (IL) playing a key role in modulating the COF channel and enhancing the CO₂ affinity. The resulting membrane exhibited a CO₂ permeability of 17 449 Barrer and a CO₂/N₂ selectivity of 27.2, surpassing the 2019 Jansen/McKeown upper bound.

Chemical Communications

A phase-transition ionic liquid endows COF-based mixed matrix membranes with efficient CO₂ separation†

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A phase-transition ionic liquid endows COF-based mixed matrix membranes with efficient CO₂ separation

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Chemical Communications