▎ 摘　　要

Graphene/nickel oxide composites (RG/NiO) were prepared by microwave-assisted in-situ synthesis of nano-particles NiO on the defects of thermal expansion graphene (RG). The structure, morphology and the NiO content of the composites were characterized by X-ray diffraction (XRD), Raman spectra (Raman), Fourier transform infrared (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and thermogravimetry-differential thermal analysis (TGA-DSC). The results show that the number of high-defects graphene layers is about 7 similar to 8 and the interlay spacing is around 0.35 nm. After hydrothermal reaction and microwave irradiation, the oxidation resistance of graphene became poor obviously. The nanoparticles NiO with an average diameter of 25 nm evenly and densely coated on the graphene sheet. Simultaneously the weight percentage of NiO in the RG/NiO composites is estimated to be 19.8wt%.