title: Remarkably enhanced gas separation by partial self-conversion of a laminated membrane to metal-organic frameworks.
abstract: Separation methods based on 2D interlayer galleries are currently gaining widespread attention. The potential of such galleries as high-performance gas-separation membranes is however still rarely explored. Besides, it is well recognized that gas permeance and separation factor are often inversely correlated in membrane-based gas separation. Therefore, breaking this trade-off becomes highly desirable. Here, the gas-separation performance of a 2D laminated membrane was improved by its partial self-conversion to metal-organic frameworks. A ZIF-8-ZnAl-NO3 layered double hydroxide (LDH) composite membrane was thus successfully prepared in one step by partial conversion of the ZnAl-NO3 LDH membrane, ultimately leading to a remarkably enhanced H2 /CH4 separation factor and H2 permeance.
authors.affiliation: Institute of Physical Chemistry and Electrochemistry, Leibniz University Hannover, Callinstr. 22, 30167 Hannover (Germany). yi.liu@pci.uni-hannover.de.
authors.forename: Yi
authors.initials: Y
authors.lastname: Liu
authors.forename: Jia Hong
authors.initials: JH
authors.lastname: Pan
authors.forename: Nanyi
authors.initials: N
authors.lastname: Wang
authors.forename: Frank
authors.initials: F
authors.lastname: Steinbach
authors.forename: Xinlei
authors.initials: X
authors.lastname: Liu
authors.forename: Jürgen
authors.initials: J
authors.lastname: Caro
keywords: layered compounds; membranes; metal-organic frameworks; post-synthetic modification; solvothermal growth