synthesis of binary ti-si mixed oxides nanoparticles with rutile structure as selective catalyst for epoxidation of alkenes

the nanoparticles of ti-si mixed oxides (ntso) with rutile structure were prepared by sol-gel method in a mixture of alcohol and water as solvent. the solid product was characterized by xrd, ftir, sem, tem, uv, tga and laser raman spectroscopy. the catalytic activity of ntso (5-10 nm) was investigated in the epoxidation of cis stilbene, trans stilbene, and norbornene by using oxidants such as tert-butylhydroperoxide (tbhp), molecular oxygen (o2)/isobutyraldehyde (iba) and hydrogen peroxide (h2o2). it was found that epoxides of trans-stilbene andnorbornenewereformedquantitativelywiththegreenh2o2oxidantduring12h.