期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 139, 期 2-3, 页码 1003-1008出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2013.02.071
关键词
Organometallic compounds; Crystal growth; Electron microscopy; Nucleation
资金
- Monash University
- Australian Research Council through the Future Fellowship scheme
Alumina hollow fiber supported ZIF-8 membranes and crystals have been prepared in diluted aqueous solutions. The concentration of the aqueous solution, synthesis temperature and time were examined in detail. The particle sizes of ZIF-8 crystals increased from about 90 nm to 5.0 mu m with the increase of the dilution of the aqueous synthesis solution. Continuous ZIF-8 membranes were obtained by using the diluted synthesis solution with a Zn2+:2-methylimidazolate:H2O molar ratio of 1:70:4952 at 50-70 degrees C for 24 h, and their thicknesses were about 0.8-1.4 mu m. Gas permeation tests indicated the ZIF-8 membranes are continuous and compact. The schematic formation of ZIF-8 membranes and crystals were proposed, and only in the diluted aqueous solution, ZIF-8 membranes and crystals could be prepared at the same time. (C) 2013 Elsevier B.V. All rights reserved.
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