지르코니움 실리카라이트-1의 합성 및 특성 연구

초록

The framework substitution of silicon and/or aluminum by various hetero-atoms into the framework of different zeolites has received considerable attention in the utilization of zeolites as catalysts. In this respect, isomorphous substitution of titanium, vanadium, or zirconium into the framework of high-silica zeolites has expanded the scope of application of these materials. These isomorphously substituted zeolites are reported to be very promising in the liquid phase catalytic oxidation of hydrocarbons. Though synthesis of zirconium silicalite-1 has been reported in open literature, its physicochemical properties were not as extensively investigated as the titanium silicalite molecular sieves, and this justifies the need for further investigation concerning the synthesis of zirconium silicalite-1 with detailed characterization and evaluation of its catalytic property. In this work, we report the hydrothermal synthesis of zirconium silicalite-1 using silicon and zirconium alkoxides. Results from X-ray diffraction, scanning electron microscopy, UV-VIS diffuse reflectance spectroscopy, 29Si MAS NMR, nitrogen adsorption, and elemental analysis were discussed to varify to the incorporation of zirconium in the zeolite framework. 2-butanol oxidation over ZS-1 using hydrogen peroxide as an oxidant also carried out to evaluate its catalytic property.