Abstract Closely packed b-oriented silicalite-1 were manually assembled on α-Al2O3 supported PVA film, which can acted as good seed layer after removal of the PVA layer by calcination. Perfect b-oriented MFI membrane was synthesized by secondtime seeded growth procedure. When preheated the precursor solution which molar ratio was n(TEOS)∶n(TPAOH)∶n(H2O)=1.0∶0.2∶200.0, the unwanted twingrowth could be effectively inhibited. SEM and XRD detections confirmed that a continuous and crackfree b-oriented MFI film was formed, and zeolite seeds had merged with each other very well. b-oriented multi-layer silicalite-1 crystals were also used as seed layer and continuous membrane was prepared after crystallization for 3 h. The preparation of b-oriented MFI films on macroporous support could greatly improve separation and/or reaction performance.
2013, Vol. 30 
