Ultrathin metal–organic framework membrane production by gel–vapour deposition

Wanbin Li (), Pengcheng Su, Zhanjun Li, Zehai Xu, Fei Wang, Huase Ou, Jiaheng Zhang, Guoliang Zhang () and Eddy Zeng
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Wanbin Li: Jinan University
Pengcheng Su: Zhejiang University of Technology
Zhanjun Li: Jinan University
Zehai Xu: Zhejiang University of Technology
Fei Wang: Jinan University
Huase Ou: Jinan University
Jiaheng Zhang: Zhejiang University of Technology
Guoliang Zhang: Zhejiang University of Technology
Eddy Zeng: Jinan University

Nature Communications, 2017, vol. 8, issue 1, 1-8

Abstract: Abstract Ultrathin, molecular sieving membranes composed of microporous materials offer great potential to realize high permeances and selectivities in separation applications, but strategies for their production have remained a challenge. Here we show a route for the scalable production of nanometre-thick metal–organic framework (MOF) molecular sieving membranes, specifically via gel–vapour deposition, which combines sol–gel coating with vapour deposition for solvent-/modification-free and precursor-/time-saving synthesis. The uniform MOF membranes thus prepared have controllable thicknesses, down to ~17 nm, and show one to three orders of magnitude higher gas permeances than those of conventional membranes, up to 215.4 × 10−7 mol m−2 s−1 Pa−1 for H2, and H2/C3H8, CO2/C3H8 and C3H6/C3H8 selectivities of as high as 3,400, 1,030 and 70, respectively. We further demonstrate the in situ scale-up processing of a MOF membrane module (30 polymeric hollow fibres with membrane area of 340 cm2) without deterioration in selectivity.

Date: 2017
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DOI: 10.1038/s41467-017-00544-1

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