▎ 摘　　要

In this study, graphene based sheets such as graphene oxide (GO) and graphene (G) were produced via a facile preparation route involving graphite oxidation, ultrasonic exfoliation and chemical reduction. Also, this paper reports simple approaches for deposition of manganese dioxide, ferric hydroxide and cobalt nanoparticles onto the surface of the graphene based sheets. Chemical deposition method of metal salt with graphene based sheets was performed to prepare nanocomposites. The structural, surface and characteristics of the GO, G and their nanocomposites were investigated by Fourier transform infrared spectroscopy, Raman spectroscopy, powder X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, atomic force microscopy and X-ray photoelectron spectroscopy. The results demonstrated that interaction between GO as matrix and metal nanoparticles were via hydroxyl, carbonyl and/or carboxylate groups. The metal nanoparticles were homogeneously distributed on the matrix of composite. (c) 2013 Elsevier Ltd. All rights reserved.