Metal-organic framework-based CO₂ capture: from precise material design to high-efficiency membranes

Abstract

A low-carbon economy calls for CO₂ capture technologies. Membrane separations represent an energy-efficient and environment-friendly process compared with distillations and solvent absorptions. Metal-organic frameworks (MOFs), as a novel type of porous materials, are being generated at a rapid and growing pace, which provide more opportunities for high-efficiency CO₂ capture. In this review, we illustrate a conceptional framework from material design and membrane separation application for CO₂ capture, and emphasize two importance themes, namely (i) design and modification of CO₂-philic MOF materials that targets secondary building units, pore structure, topology and hybridization and (ii) construction of crack-free membranes through chemical epitaxy growth of active building blocks, interfacial assembly, ultrathin two-dimensional nanosheet assembly and mixed-matrix integration strategies, which would give rise to the most promising membrane performances for CO₂ capture, and be expected to overcome the bottleneck of permeability-selectivity limitations.

Graphical abstract

Keywords

CO₂ capture / CO₂-philic MOFs / crack-free membranes

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Acknowledgements

W.Y. thanks the financial support of the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB17020400) and the National Natural Science Foundation of China (Grant No. 21721004). Y.B. thanks the financial support of the National Natural Science Foundation of China (Grant No. 21706249) and DICP (Grant No. DICP ZZBS201711).

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