Titanium Doped Octahedral Manganese Oxide Hybrid Catalyst in the Oxidation of Cyclohexene

Fitri Hayati, University Technology Malaysia
Hadi Nur, University Technology Malaysia
Halimaton Hamdan, University Technology Malaysia

Abstract

Octahedral manganese oxide molecular sieves (OMS-2) was doped with titanium to form hybrid catalyst (Ti-OMS-2) by precipitation method. Atomic absorption and X-ray diffraction analysis indicate the incorporation of titanium into the framework of OMS-2. Infrared and pyridine adsorption measurements demonstrated that Lewis acid sites were created by the presence of titanium in the OMS-2. Ti-OMS-2 is the most active catalyst for the oxidation of cyclohexene with tert-butylhydroperoxide (TBHP) compared to titanium oxide (TiO2) and OMS-2; suggesting a synergetic effect between Ti and OMS-2 in the hybrid catalyst.