MOF-in-COF molecular sieving membrane for selective hydrogen separation

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Fan, H.; Peng, M.; Strauss, I.; Mundstock, A.; Meng, H.; Caro, J.: MOF-in-COF molecular sieving membrane for selective hydrogen separation. In: Nature Communications 12 (2021), Nr. 1, 38. DOI:

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Sum total of downloads: 85

Covalent organic frameworks (COFs) are promising materials for advanced molecular-separation membranes, but their wide nanometer-sized pores prevent selective gas separation through molecular sieving. Herein, we propose a MOF-in-COF concept for the confined growth of metal-organic framework (MOFs) inside a supported COF layer to prepare MOF-in-COF membranes. These membranes feature a unique MOF-in-COF micro/nanopore network, presumably due to the formation of MOFs as a pearl string-like chain of unit cells in the 1D channel of 2D COFs. The MOF-in-COF membranes exhibit an excellent hydrogen permeance (>3000 GPU) together with a significant enhancement of separation selectivity of hydrogen over other gases. The superior separation performance for H2/CO2 and H2/CH4 surpasses the Robeson upper bounds, benefiting from the synergy combining precise size sieving and fast molecular transport through the MOF-in-COF channels. The synthesis of different combinations of MOFs and COFs in robust MOF-in-COF membranes demonstrates the versatility of our design strategy.
License of this version: CC BY 4.0 Unported
Document Type: article
Publishing status: publishedVersion
Issue Date: 2021
Appears in Collections:Fakultät für Mathematik und Physik
Naturwissenschaftliche Fakultät

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1 image of flag of Germany Germany 33 38.82%
2 image of flag of United States United States 13 15.29%
3 image of flag of China China 7 8.24%
4 image of flag of India India 4 4.71%
5 image of flag of Korea, Republic of Korea, Republic of 3 3.53%
6 image of flag of Iraq Iraq 3 3.53%
7 image of flag of Taiwan Taiwan 2 2.35%
8 image of flag of Singapore Singapore 2 2.35%
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10 image of flag of United Arab Emirates United Arab Emirates 2 2.35%
    other countries 14 16.47%

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