▎ 摘　　要

High efficient graphene based platinum selenide composite photocatalyst were synthesized by ultrasonic assisted method. The "as-prepared" nanocomposites are further characterized by X-ray diffraction, scanning electron microscopy with an energy dispersive X-ray analysis, transmission electron microscopy, UV-visible absorbance spectra analysis and diffuse reflectance spectra analysis. The photocatalytic activities of the composites are investigated by the degradation of methyl orange as a standard dye. The results showed that the photocatalytic activity of PtSe2 was significantly enhanced by the loading of graphene in the composites.