Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 58, Issue 24, Pages 8201-8205Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201903554
Keywords
gas separation; hollow fibers; membranes; nanosheets; zeolites
Categories
Funding
- US National Science Foundation [1534179]
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1534179] Funding Source: National Science Foundation
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High-quality 2D MFI nanosheet coatings were prepared on alpha-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 (0k0) 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.
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