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Tytuł:
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Uniformly Oriented Zeolite ZSM‐5 Membranes with Tunable Wettability on a Porous Ceramic.
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Autorzy:
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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.
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Temat:
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ZEOLITES
CHEMICAL properties
AQUEOUS solutions
CHEMICAL engineering
CALCINATION (Heat treatment)
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Źródło:
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Angewandte Chemie; 9/17/2018, Vol. 130 Issue 38, p12638-12642, 5p
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Abstract: 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. [ABSTRACT FROM AUTHOR]
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