Direct synthesis,characterization and catalytic performance of novel Ti-SBA-1 cubic mesoporous molecular sieves

摘要

The 3d-cubic Pm3n Ti-incorporated SBA-1 mesoporous molecular sieves were directly synthesized under strongly acidic conditions and characterized by various techniques.XRD showed that the synthesized mesoporous materials had a well-ordered cubic structure.N_2 adsorption/desorption measurements confirmed that the resultant samples had large mesopores(ca.20 A)and high surface areas(> 1000 m~2 g~(-1)).UV-vis and FT-IR results revealed that incorporated titanium species existed in a highly dispersed state and had tetrahedral coordination.SEM is used to determine the particle size and particle morphology of the synthesized materials.A catalytic test using epoxidation of styrene as a probe reaction proved that the framework Ti in the Ti-SBA-1 possessed relatively high activity and selectivity.