Catalytic activity of Mn(III) porphyrins supported onto graphene oxide nano-sheets for green oxidation of sulfides

In this research, oxidation of various sulfides with urea hydrogen peroxide (UHP) in the presence of manganese porphyrin grafted onto graphene oxide ([Mn(THPP)OAc@GO]) in ethanol was studied. The heterogenized catalyst was characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier-transform infrared (FT-IR), and UV-Vis spectroscopy. The amount of Mn-porphyrin loaded on the GO nano-sheets was determined by atomic absorption spectroscopy (AAS) and the thermal stability of the heterogenized catalyst was investigated by thermo-gravimetric analysis (TGA). [Mn(THPP)OAc@GO] was applied for the green oxidation of different sulfides and the solid catalyst can be simply reused several times without losing its catalytic efficiency.