Synthesis and electrochemical properties of reduced graphene oxide via chemical reduction using thiourea as a reducing agent

Synthesis of reduced graphene oxide sheets from graphene oxide using thiourea as a reducing agent through chemical reduction has been explored. Fourier transform infrared spectroscopy, Raman spectroscopy, Transmission electron microscopy and X-ray diffraction analysis confirm the formation of graphene sheets. Thermogravimetric analysis reveals the thermal stability of graphene. Electrochemical performance of the graphene electrode was analyzed by cyclic voltammetry, which showed an increase in capacitive behavior compared to graphene oxide. This investigation highlights the importance of the preparation of reduced graphene oxide sheets using thiourea as a reducing agent and its energy storage applications in supercapacitors. (C) 2013 Elsevier B.V. All rights reserved.