Preparation of Oriented MFI Zeolite Films by Controlling Dissolution of Source Materials

Abstract

Oriented MFI zeolite films were prepared on ceramic substrates by hydrothermal method, using bulk glass as a source material. When dissolution rate of the bulk glass was less than 3.39 g h^-1 L^-1 under hydrothermal conditions, the b axis oriented MFI zeolite films were successfully formed. SEM observations showed that the oriented MFI films were ~ 450 nm in thickness and pin hole free. A formation mechanism of the oriented MFI films will be discussed, based on the microstructural changes and the pH variation of reaction solution.