Study on Preparation of Titanium Dioxide/Graphene Composites

In this paper, TiO₂/graphene composites were prepared by combination of graphene powder with the calcinated TiO₂ from orthotitanic acid, which was synthesized by acidolysis and neutralization of metatitanic acid followed by spray drying.The structure and morphology of the composites were characterized by SEM and XRD.And for UV-light photocatalytic degradation of methyl orange, the optimized preparation parameters of TiO₂/graphene composites were obtained.With the optimized mass ratio of TiO₂ to graphene（100∶1） for TiO₂/graphene composites, calcination temperature of 500 ℃ and calcination time of 1 h, the photocatalytic degradation rate of methyl orange was as high as 88.33%.