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Enhanced Water Stability in Zn‐Doped Zeolitic Imidazolate Framework‐67 (ZIF‐67) for CO 2 Capture Applications
Author(s) -
Qian Xukun,
Ren Qingbao,
Wu Xiaofei,
Sun Jing,
Wu Hongyu,
Lei Jun
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201702114
Subject(s) - zeolitic imidazolate framework , thermogravimetric analysis , imidazolate , sorption , doping , thermal stability , crystallization , porosity , materials science , chemical engineering , specific surface area , metal organic framework , chemistry , adsorption , composite material , organic chemistry , catalysis , optoelectronics , engineering
In this work, the water stability of zeolitic imidazolate framework‐67 (ZIF‐67) is successfully enhanced by Zn‐doping during the crystallization process. Both elemental mapping analysis and X‐ray diffraction (XRD) results reveal that Zn element is doped in the ZIF‐67’s crystals. The thermal stability, surface area and CO 2 capacity are not significantly affected by Zn‐doping as evidenced by thermogravimetric analysis (TGA) and gas sorption. When exposed to liquid water, the doped ZIF‐67 s show better stability in terms of crystal structure, morphology, surface area and CO 2 uptake capacity. However, the undoped ZIF‐67 crystals collapse and nearly lose their porosity as well as CO 2 uptake capacity after the same exposure. This study provides a new approach to enhance the water stability of ZIF‐67.