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Issue 37, 2017
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Enzyme-embedded metal–organic framework membranes on polymeric substrates for efficient CO2 capture

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Abstract

In this work, carbonic anhydrase (CA) molecules were embedded into metal–organic frameworks (MOFs) via physical absorption and chemical bonds, which could overcome the enzymatic inactivation and the poor separation property of pristine MOF materials. And then, these nanocomposites (enzyme-embedded MOFs) as the crystal seeds were in situ grown on oriented halloysite nanotube layers to develop novel biocatalytic composite membranes. These membranes exhibited optimal separation performance with a CO2/N2 selectivity of 165.5, about 20.9 fold higher than that of the membrane without embedded CA molecules, surpassing the Robeson upper bound (2008). At the same time, the CO2 permeance increased about 3.2 fold (from 7.6 GPU to 24.16 GPU). Importantly, the biocatalytic composite membranes showed good stability and mechanical properties and were easily scalable, which could be extended to industrial applications.

Graphical abstract: Enzyme-embedded metal–organic framework membranes on polymeric substrates for efficient CO2 capture

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Publication details

The article was received on 30 Apr 2017, accepted on 18 Aug 2017 and first published on 18 Aug 2017


Article type: Paper
DOI: 10.1039/C7TA03719H
Citation: J. Mater. Chem. A, 2017,5, 19954-19962
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    Enzyme-embedded metal–organic framework membranes on polymeric substrates for efficient CO2 capture

    Y. Zhang, H. Wang, J. Liu, J. Hou and Y. Zhang, J. Mater. Chem. A, 2017, 5, 19954
    DOI: 10.1039/C7TA03719H

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