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GO-guided direct growth of highly oriented metal–organic framework nanosheet membranes for H2/CO2 separation

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Abstract

Highly oriented, ultrathin metal–organic framework (MOF) membranes are attractive for practical separation applications, but the scalable preparation of such membranes especially on standard tubular supports remains a huge challenge. Here we report a novel bottom-up strategy for directly growing a highly oriented Zn2(bIm)4 (bIm = benzimidazole) ZIF nanosheet tubular membrane, based on graphene oxide (GO) guided self-conversion of ZnO nanoparticles (NPs). Through our approach, a thin layer of ZnO NPs confined between a substrate and a GO ultrathin layer self-converts into a highly oriented Zn2(bIm)4 nanosheet membrane. The resulting membrane with a thickness of around 200 nm demonstrates excellent H2/CO2 gas separation performance with a H2 performance of 1.4 × 10−7 mol m−2 s−1 Pa−1 and an ideal separation selectivity of about 106. The method can be easily scaled up and extended to the synthesis of other types of Zn-based MOF nanosheet membranes. Importantly, our strategy is particularly suitable for the large-scale fabrication of tubular MOF membranes that has not been possible through other methods.

Graphical abstract: GO-guided direct growth of highly oriented metal–organic framework nanosheet membranes for H2/CO2 separation

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Publication details

The article was received on 08 Nov 2017, accepted on 01 Apr 2018 and first published on 02 Apr 2018


Article type: Edge Article
DOI: 10.1039/C7SC04815G
Citation: Chem. Sci., 2018, Advance Article
  • Open access: Creative Commons BY license
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    GO-guided direct growth of highly oriented metal–organic framework nanosheet membranes for H2/CO2 separation

    Y. Li, H. Liu, H. Wang, J. Qiu and X. Zhang, Chem. Sci., 2018, Advance Article , DOI: 10.1039/C7SC04815G

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