Journal
RSC ADVANCES
Volume 4, Issue 62, Pages 33007-33012Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra05182c
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Funding
- Natural Science Foundation of China [21271015, 21322601, 21375095]
- Program for New Century Excellent Talents in University [NCET-13-0647]
- Beijing Municipal Natural Science Foundation [2132013]
- Beijing Postdoctoral Research Foundation
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The ability to fabricate high-quality MOF-based membranes is critical and highly desired due to their outstanding performance in molecule separations and sensors. In this work, a water stable MOF, ZIF-8 is chosen as the typical example to validate a new self-modified counter diffusion assisted secondary growth method for the fabrication of inner skin tubular MOF membranes. The preparation route involves two main steps: counter diffusion for modifying the rough surface of industrial ceramic substrate (plugging pores in the ceramic tube) with homogenous ZIF-8 nanocrystals, and the secondary solvothermal growth for fabricating continuous ZIF-8 membranes on the inner surface of the tubular substrate. The ZIF-8 membranes prepared by this method are characterized in detail. The pre-modification process and the use of a low-reactivity growth solution containing zinc acetate favor the growth of dense ZIF-8 membrane in the solvothermal process.
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