One pot preparation of reduced graphene oxide (RGO) or Au (Ag) nanoparticle-RGO hybrids using chitosan as a reducing and stabilizing agent and their use in methanol electrooxidation

摘要: Abstract An environment-friendly approach to synthesizing reduced graphene oxide (RGO) was developed by using chitosan (CS) as both a reducing and stabilizing agent. Factors that affect the reduction of (GO), such ratio CS/GO, pH temperature, were explored obtain optimum reaction conditions. The RGO characterized with UV visible absorption spectroscopy, Fourier transform infrared Raman X-ray diffraction thermo-gravimetric analysis, photoelectron spectroscopy transmission electron microscopy. Analysis shows CS macromolecules can efficiently reduce GO at comparatively low temperature their adsorption onto nanosheets allows stable aqueous dispersion be formed. Since is natural, nontoxic biodegradable macromolecule, this provides new green method for would facilitate large scale production RGO, which has great value applications. Moreover, AgNO 3 (or HAuCl 4 ) in one pot Ag nanoparticle-RGO hybrids or Au exhibit good electrochemical activity.