Synthesis,Characterization and Catalytic Oxidation Properties of Mesoporous Ti-HMS-1 Containing MFI Structure Unites

Ti-incorporated Ti-HMS-1 mesoporous molecular sieve was synthesized at ambient tem- perature by the assembly of TS-1 precursors using dodecylamine (DDA) surfactant as template agent, and characterized by XRD,TEM,nitrogen adsorption,FT-IR,UV-Vis diffuse reflectance.The results show that Ti-HMS-1 prepared consists of the mesoporous structure withworm-likeholes and MFI structure unites,and the Ti atoms are incorporated into the framework.After treated in the boiling water at 373K for 50h,Ti-HMS-1 remains most of the mesoporous structures,which indicates Ti-HMS-1 has higher hydrothermal stability as compared with Ti-HMS.For the oxidation of styrene using H_2O_2 as oxidant,the catalytic performance of Ti-HMS-1 is higher obviously than that of Ti-HMS or TS-1. The selectivity of Ti-HMS-1 to products is similar to that of Ti-HMS.