The preparation and photocatalytic activity of rGO/TiO2 composite photocatalyst
Graphene oxide (GO) was prepared by the Hummers method. In the synthesis process of GO/TiO2 precursor sol, citric acid was selected as the hydrolysis inhibitors of tetrabutyl titanate and the surfactant of graphene oxide. After drying and heat treatment, the reduced graphene oxide/TiO2(rGO/TiO2) photocatalysts were prepared by the method of sodium borohydride reduction. The photocatalysts were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and photoluminescence (PL) spectroscopy technology. The effects of the amounts of GO additives and the photocatalysts on the degradation rate of methyl orange were investigated, respectively. The dispersion of nanometer TiO2 on the graphene surface was improved effectively; the photocatalytic activity of rGO/TiO2 was obviously higher than that of pure TiO2, and the rGO/TiO2 photocatalysts presented the best photocatalytic performance with the GO amount of 10% and the photocatalysts mass of 0.10g.
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NSTL
万方数据
维普
