Preparation of S doped TiO_2/graphene and photocatalytic activity of hydrogen production by splitting water

In order to improve the photocatalytic performance of TiO2 for splitting water to get hydrogen,S doped TiO2/graphene composites(S-TiO2/RGO)were prepared with a one-step hydrothermal method in the paper.The prepared photocatalysts were characterized by XRD,XPS,FT-IR,TEM,UV-Vis testing techniques.In addition,the photocatalytic activity for splitting water of the prepared photocatalysts was investigated.The results showed that TiO2 particles with size of 14 nm were dispersed on the surface of graphene sheets uniformly in the S-TiO2/RGO composite.Compared with TiO2 prepared under the same condition,the absorption of S-TiO2/RGO composite in the visible region was significantly enhanced.When S∶RGO∶TiO2of mass ratio is 1∶0.1∶25,the rate of hydrogen production is up to 141.7μmol/h with composite photocatalysts.