Influence of the Diols on the Morphology Control Crystals of the Si-MFI

• 1、State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, PR China

Abstract：Morphology control of silicalite-1 (Si-MFI) crystals was achieved by employing microwave-assisted solvothermal synthesis in the reaction system TEOS–TPAOH-alcohol-H2O by using diols as a co-solvent. The influences of various experimental parameters, such as the concentration of diols in the reaction mixture, the type of the diols, and microwave heating profiles on the morphology of the resulting Si-MFI crystals were investigated. Our studies show that c-direction prolonged Si-MFI crystals could be synthesized by using diols as co-solvent with high concentration and long microwave heating time. The resulting products were further characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM).

Keywords： Zeolites, Si-MFI, Microwave heating, Solvothermal synthesis, Morphology control,Co-solvent