Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5463873 | Materials Letters | 2017 | 11 Pages |
Abstract
Zeolitic-imidazolate framework-8 (ZIF-8), a representative member of the ZIF class, have attracted extensive application in gas adsorption, membrane separation and catalysis. Since the discovery of ZIF-8, they are always synthesized from zinc nitrate. In this work, we evaluate the hydrothermal stability of ZIF-8 nanocrystals and polycrystalline membranes synthesized from four kinds of common zinc salts. Several physical techniques (X-ray diffraction, scanning electron microscope, and nitrogen adsorption) indicate that ZIF-8 nanocrystals derived from zinc acetate, rather than zinc nitrate, exhibit the highest hydrothermal stability. After immersed in water (â¼3 wt%) at 80 °C for 10 days, nanocrystals derived from zinc acetate still could sustain â¼45% relative crystallinity, whereas those from zinc nitrate were transformed to amorphous products. The polycrystalline membrane derived from zinc acetate also exhibits the highest dynamic hydrothermal stability. This work is benefit to the synthesis of ZIF-8 materials for application in water-sensitive systems.
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
Luqian Sheng, Fan Yang, Chongqing Wang, Jian Yu, Lixiong Zhang, Yichang Pan,