MFI구조를 가진 섬유모양의 금속 실리카 제올라이트의 마이크로파 합성

초록

In the paper, we report syntheses of silicalite(Si-MFI) zeolite crystals with tetravalent metal ions incorporated to synthesize metalosilicalite(M-MFI;M=Sn,Zr,Sn/Zr,Ti/Zr) zeolite crystals by using microwaveirradiation reactions. β-Diketonate(acetylacetone)was used as a chelating ligand of the metal precursors, in order to reduce their hydrolysis rates and, therefore, to enhance framework incorporation of each metal in the syntheses of M-MFI zeolites. The zeolite crystals formed show puck-like morphology, and these crystals are stacked to form fibers with the degree of stacking varied depending on the nature of the tetravalent metal ion used. Importantly, the stacking of the zeolite crystals and the resultant fibrous morphology are observed only when the substituting metal ion are present.