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Continuous Zeolite MFI Membranes Fabricated from 2D MFI Nanosheets on Ceramic Hollow Fibers
Author(s) -
Min Byunghyun,
Yang Shaowei,
Korde Akshay,
Kwon Yeon Hye,
Jones Christopher W.,
Nair Sankar
Publication year - 2019
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.201903554
Subject(s) - membrane , materials science , nanosheet , zeolite , ceramic , chemical engineering , fiber , butane , filtration (mathematics) , hydrothermal circulation , nanotechnology , molecular sieve , nanoscopic scale , composite material , catalysis , organic chemistry , chemistry , biochemistry , statistics , mathematics , engineering
High‐quality 2D MFI nanosheet coatings were prepared on α‐alumina hollow fiber supports by vacuum filtration and then transformed into molecular sieving membranes by two sequential hydrothermal treatments. This processing method eliminates the need for specially engineered silica‐based support materials that have so far been necessary to allow the formation of functional membranes from 2D MFI nanosheets. The sequential steps enhance adhesion of the membrane on the fiber support, fill in nanoscale gaps between the 2D nanosheets, and preserve the desirable (0 k 0) out‐of‐plane orientation without the need of any support engineering or modification. The membrane exhibits high performance for separation of n ‐butane from i ‐butane, and for other technologically important hydrocarbon separations. The present findings have strong implications on strategies for obtaining thin, highly selective zeolite membranes from 2D zeolites in a technologically scalable manner.