Remarkably Enhanced Gas Separation by Partial Self‐Conversion of a Laminated Membrane to Metal–Organic Frameworks |
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| Authors: | Dr Yi Liu Dr Jia Hong Pan Nanyi Wang Frank Steinbach Dr Xinlei Liu Prof Jürgen Caro |
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| Affiliation: | 1. Institute of Physical Chemistry and Electrochemistry, Leibniz University Hannover, Callinstr. 22, 30167 Hannover (Germany);2. Department of Materials Science and Engineering, National University of Singapore, 5 Engineering Drive 2, 117579 (Singapore);3. Department of Chemical Engineering, Imperial College London, London SW7 2AZ (UK) |
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| 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. |
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| Keywords: | layered compounds membranes metal– organic frameworks post‐synthetic modification solvothermal growth |
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