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Zeolitic Imidazolate Framework/Graphene Oxide Hybrid Nanosheets as Seeds for the Growth of Ultrathin Molecular Sieving Membranes
Author(s) -
Hu Yaoxin,
Wei Jing,
Liang Yan,
Zhang Huacheng,
Zhang Xiwang,
Shen Wei,
Wang Huanting
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201509213
Subject(s) - membrane , graphene , materials science , zeolitic imidazolate framework , oxide , chemical engineering , imidazolate , nanocrystal , seeding , selectivity , nanotechnology , layer (electronics) , crystal (programming language) , chemistry , adsorption , metal organic framework , organic chemistry , catalysis , biochemistry , programming language , aerospace engineering , computer science , engineering , metallurgy
A defect‐free zeolitic imidazolate framework‐8 (ZIF‐8)/graphene oxide (GO) membrane with a thickness of 100 nm was prepared using two‐dimensional (2D) ZIF‐8/GO hybrid nanosheets as seeds. Hybrid nanosheets with a suitable amount of ZIF‐8 nanocrystals were essential for producing a uniform seeding layer that facilitates fast crystal intergrowth during membrane formation. Moreover, the seeding layer acts as a barrier between two different synthesis solutions, and self‐limits crystal growth and effectively eliminates defects during the contra‐diffusion process. The resulting ultrathin membranes show excellent molecular sieving gas separation properties, such as with a high CO 2 /N 2 selectivity of 7.0. This 2D nano‐hybrid seeding strategy can be readily extended to the fabrication of other defect‐free and ultrathin MOF or zeolite molecular sieving membranes for a wide range of separation applications.