Titanium substituted highly ordered SBA-15 spheres with a diameter about 5 μm in a ternary P123-H2O-HCl-TEOS system were prepared by the hydrothermal method and the catalytic activity in the epoxidation of cyclohexene was studied. The synthesized materials were characterized by XRD, ICP-AES, FT-IR, BET and SEM, UV–Vis and N2 adsorption/desorption isotherms. The results show that incorporation of titanium into the framework of SBA-15 makes the surface area, pore diameter and pore volume increase and the pore walls slimmer than pure SBA-15. When the titanium content is above a critical value, TiO2 anatase forms on the material surface. The Ti-SBA-15 materials showed good catalytic activity for the oxidation of cyclohexene. The catalytic activity increases with an increase of Ti content and decreases when anatase TiO2 clusters are formed.
1. Singh, AP, Shylesh, S, Samuel, PP2007Appl Catal A Gen318:128–136.