GO-guided direct growth of highly oriented metal-organic framework nanosheet membranes for H(2)/CO(2) separation.
GO-guided direct growth of highly oriented metal-organic framework nanosheet membranes for H(2)/CO(2) separation.
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GO引导直接生长高度定向金属有机骨架纳米片膜用于H-2/CO2分离
DOI:
10.1039/c7sc04815g
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发表时间:
2018-05-07
期刊:
影响因子:
8.4
通讯作者:
Zhang X
中科院分区:
文献类型:
--
作者:
Li Y;Liu H;Wang H;Qiu J;Zhang X
A highly oriented 2D nanosheet metal–organic framework membrane is fabricated by a direct growth strategy. 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.
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