Composites of micro- and mesoporous materials: simultaneous syntheses of MFI/MCM-41 like phases by a mixed template approach

In situ formation of the micro- and mesoporous structures MFI and MCM-41 was obtained using a two-template syntheses gel system [C6H13(CH3)3NBr and C14H29(CH3)3NBr]. The mixed phases were obtained by optimizing template concentrations and reaction temperatures. Constant temperature syntheses as well as sequential high/low or low/high temperature strategies were performed successfully. It was found that the relative amounts of the two structures MFI and MCM-41 in the final products can be controlled by varying the ratio of the templates and by tuning the synthesis temperature. Characterization results indicate that phases of varying complexity were obtained.