Synthesis of TS-1 by microwave heating of template-impregnated SiO2-TiO2 xerogels

TS-1 was prepared by microwave heating of a SiO2-TiO2 xerogel dry-impregnat ed with the template. TPAOH. A highly crystalline product was obtained with in 30 min after microwave irradiation with yields over 90%. These are signi ficant advantages over the TS-l obtained by conventional oven heating using alkoxide precursors in liquid phase, which requires 1-2 day crystallizatio n time with low product yields. Characterization of the TS-1 obtained was c arried out using XRD, SEM, FT-IR, and UV-vis spectroscopy, and catalytic ac tivity was examined For 1-hexene epoxidation using H2O2 as oxidant. These s tudies revealed that the material obtained by microwave heating of the mixe d oxide gel shows essentially identical physicochemical properties to those prepared by conventional means.