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- Title
Ultrathin metal–organic framework membrane production by gel–vapour deposition.
- Authors
Wanbin Li; Pengcheng Su; Zhanjun Li; Zehai Xu; Fei Wang; Huase Ou; Jiaheng Zhang; Guoliang Zhang; Eddy Zeng
- 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.
- Publication
Nature Communications, 2017, Vol 8, Issue 9, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-017-00544-1