CIESC Journal ›› 2018, Vol. 69 ›› Issue (8): 3724-3731.doi: 10.11949/j.issn.0438-1157.20180194

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Preparation of ZIF-8 membranes on ZnO modified stainless steel nets

LI Jia, GU Jinghua, YIN Wenjie, LI Zeyao   

  1. School of Materials Science and Engineering, Beihang University, Beijing 100191, China
  • Received:2018-02-11 Revised:2018-04-03 Online:2018-08-05 Published:2018-04-24
  • Supported by:

    supported by the National Natural Science Foundation of China(51178017).


ZIF-8 is one of the most perspective membrane materials for gas separation due to its regular pore size of 0.34 nm. Stainless steel nets (SSN) have the advantages of low price, easy cutting, and thin thickness as membrane substrates. In this work, ZnO buffering layer was synthesized on SSN substrate by hydrothermal method. ZIF-8 membranes were prepared on the ZnO modified SSN (ZnO/SSN) supports. ZnO/SSN supported ZIF-8 membranes were characterized by X ray diffraction (XRD) and scanning electron microscopy (SEM). The gas separation property of prepared ZIF-8 membranes was carried out. It is indicated that phase-pure and defect-free ZIF-8 membrane can be obtained on the ZnO/SSN substrate without additional activation step of ZnO layer. The ideal separation factors of H2/CO2, H2/N2 and H2/CH4 were 7.3, 9.2 and 12.4 at room temperature. The membrane demonstrates a good stability of permeability at 150℃.

Key words: ZIF-8 membrane, stainless steel net substrate, ZnO buffering layer, gas separation, hydrogen permselectivity

CLC Number: 

  • O614

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