LAUSR

H-type aluminosilicate zeolites are extensively used as solid acidic catalysts and supports in industrial catalysis. However, the conventional synthesis methods involving hydrothermal synthesis and ion-exchange process suffer from severe water pollutions and toxic gas emissions. Herein, H-type MFI zeolite catalyst with a unique stacking structure, for the first time, were directly synthesized via solvent-free route without further ion-exchange procedure, in the presence of NH4F and with the help of zeolite confinement. A panel of ex- and in-situ characterizations by XRD, SEM and solid-sate NMR provided some evidences that, after the simultaneous use of pre-made ZSM-5 and NH4F, as confined Al source and mineralizer, respectively. The confined zeolite framework of ZSM-5 prevented the forming of AlFx species between NH4F and Al atoms, thus ensuring the desirable acidic property of prepared samples. Moreover, the resulting morphology could be controlled by applying different silica substrates. Due to its unique structure and directly exposed acidic sites, without extra ion-exchange process, the obtained H-type MFI zeolite showed excellent catalytic performance in methanol to gasoline reactions. Our developed one-pot strategy provides a prior alternative for facile synthesis of H-type zeolite with defined morphology.