| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 72252 | Microporous and Mesoporous Materials | 2016 | 5 Pages |
•Very thin (900 nm) ZIF-8 membranes were synthesized on polyacrylonitrile PAN support by a double-zinc-source method.•Thin zinc oxide layer was deposited on PAN support by magnetron sputtering.•Conversion of zinc oxide to ZIF-8 was proposed as a beneficial step during growth of ZIF-8 continuous layer.•Prepared ZIF-8 membrane showed good performance for hydrogen-propane separation.
ZIF-8 composite membranes were synthesized at room temperature from aqueous solution by a double-zinc-source method on polyacrylonitrile (PAN) porous supports. The support was coated with zinc oxide (ZnO) by magnetron sputtering prior to ZIF-8 growth to improve the nucleation as well as the adhesion between the ZIF-8 layer and support. By this method, we were able to grow a continuous, dense, very thin (900 nm) and defect free ZIF-8 layer on a polymeric support. The developed ZIF-8 membranes had a gas permeance of 1.23 × 10−7 mol m−2 sec−1 Pa−1 for hydrogen and a selectivity of 26 for hydrogen/propane gases which is 5 times higher than the Knudsen selectivity. X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis were done to characterize the membranes.
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