Fabrication of Highly b-Oriented MFI Film with Molecular Sieving Properties by Controlled In-Plane Secondary Growth

Here we report a facile method to fabricate highly b-oriented and submicrorneter thin MFI films Oil substrates. Neither an anhydrous environment nor a specifically designed structure-directing agent (SDA) is required in the whole process, and by innovation of the secondary growth process. twin growth of the b-oriented seed layer is effectively suppressed with TPAOH as the SDA for the first time. Furthermore, various substrates with different surface conditions can be directly Used as substrates without premodification. A Pt electrode also was successfully Used as a substrate to grow thiS high quality MFI film, showing excellent molecular sieving ability in aqueous solution.