Abstract
The solvent-free method fabrication of zeolites represents an eco-friendly approach, which a highly attractive field of scientific research. A novel method for synthesis of micron-sized silicalite-1 zeolite under fluoride-free and solvent-free conditions has been developed. Characterization of powder X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunner-Emmett-Teller (BET) surface area were used to analyze the properties and structure of the silicalite-1 zeolite. The effects of mineralizers, organic structuring direct agents, catalyst, and crystallization time on the synthesized silicalite-1 zeolite are investigated. Silicalite-1 zeolite has microporous and mesoporous structures with a BET surface area of 350.4 m2/g. The synthesis mechanism of micron-sized silicalite-1 zeolite has been proposed, revealing that the intermediate sodium silicate dry gel is crucial for the formation of zeolite.
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