Photocatalytical performance research of WO_3·0.33H_2O/graphite intercalated nano-composites

A novel photo catalyst WO_3·0.33H_2O/graphite intercalated nano-composite(GIW) was prepared via mixing tungsten,graphite oxide and H2O2 in a water bath below 100℃.The photo-catalyst samples were characterized by X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),FT-IR analysis,high resolution transmission electron microscope(HRTEM),cyclic voltammetry(CV).The UV-visible photo-activity was evaluated through the photo degradation of methyl orange in aqueous solution and a much higher efficiency of GIW.Results showed that the oxidation-reduction potential of GIW is higher than WO_3·0.33H_2O.The increased photo-activity is due to their different oxidation-reduction potentials.What's more,the layer-structural graphite of GIW improved its conductivity and slowed down the recombination of careers.