Monolayer Assembly of Oriented Zeolite Crystals on α‐Al₂O₃ Supported Polymer Thin Films

Abstract

Silicalite‐1 monolayers on α‐Al2O3 supported polymer thin films with strong zeolite‐polymer bonding, high surface coverage, uniform orientation in b‐axis, and easy control of assembly could be manufactured by the stacking and sonication assembly or by the simpler manual assembly (see the figure). The methodology can be further applied to the monolayer assembly of various nano‐ and micro‐sized particles with surface hydroxyl groups to porous solid supported polymer thin films.

Phase separation of organic/inorganic hybrids induced by calcination: A novel route for synthesizing mesoporous silica and carbon materials

“…5), the reaction between two TEOS molecules was excluded. Therefore, we could conclude that the polymerization reaction of PVA and TEOS undergoes an alcoholysis process [38].…”

Synthesis and gas permeation properties of highly b-oriented MFI silicalite-1 thin membranes with controlled microstructure

“…This enables manual deposition of highly oriented seed crystals with high density of packing and uniform coverage. Zhang et al [30] reported b-oriented silicalite-1 films, though not continuous, formed on PVA as an intermediate layer between zeolite films and a-Al 2 O 3 supports. Following this work, we decide to investigate PVA polymers to form intermediate layers on a-Al 2 O 3 supports.…”

Oriented growth and assembly of zeolite crystals on substrates

“…Under the ultrasonic condition, the surface-bound crystals underwent rapid surface migration, which would be continuously and rapidly replaced by dispersed crystals in solution, leading to the decrease in the number of molecular linkages between zeolite crystals and the substrate surface [33] . Zhang et al [34] fabricated the b-oriented silicalite-1 monolayers on the alumina-supported PVA and chitosan films using CP-TMS as the molecular linker under the ultrasonic condition. The tightly packed zeolite monolayer was fully covered.…”