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Uniformly Oriented Zeolite ZSM‐5 Membranes with Tunable Wettability on a Porous Ceramic
Author(s) -
Fu Donglong,
Schmidt Joel E.,
Pletcher Paul,
Karakiliç Pelin,
Ye Xinwei,
Vis Carolien M.,
Bruijnincx Pieter C. A.,
Filez Matthias,
Mandemaker Laurens D. B.,
Winnubst Louis,
Weckhuysen Bert M.
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201806361
Subject(s) - wetting , membrane , monolayer , materials science , chemical engineering , zeolite , nucleation , ceramic , adsorption , substrate (aquarium) , contact angle , fabrication , porosity , nanotechnology , permeation , catalysis , chemistry , composite material , organic chemistry , medicine , biochemistry , oceanography , alternative medicine , pathology , geology , engineering
Facile fabrication of well‐intergrown, oriented zeolite membranes with tunable chemical properties on commercially proven substrates is crucial to broadening their applications for separation and catalysis. Rationally determined electrostatic adsorption can enable the direct attachment of a b ‐oriented silicalite‐1 monolayer on a commercial porous ceramic substrate. Homoepitaxially oriented, well‐intergrown zeolite ZSM‐5 membranes with a tunable composition of Si/Al=25–∞ were obtained by secondary growth of the monolayer. Intercrystallite defects can be eliminated by using Na + as the mineralizer to promote lateral crystal growth and suppress surface nucleation in the direction of the straight channels, as evidenced by atomic force microscopy measurements. Water permeation testing shows tunable wettability from hydrophobic to highly hydrophilic, giving the potential for a wide range of applications.