Solvothermal synthesis of CdS-graphene composites by varying the Cd/S ratio

Graphite oxide was prepared by Hummers method and treated by ultrasonic waves to obtain graphene oxide. CdS-graphene composites were successfully synthesized via a one-step solvothermal method with different Cd/S ratios, with cadmium acetate as cadmium source, thiourea as sulfur source and ethylene glycol as reaction solvent and characterized by X-ray diffraction, scanning electron microscopy and UV-vis absorption spectra. The photoelectric characteristics of CdS-graphene composites were evaluated by transient photocurrent response and three-electrode cyclic voltammetry. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.