微波辅助合成石墨烯/氧化镍复合材料及其表征

本文通过微波辅助的方法，快速而有效地在热膨胀石墨烯(RG)的缺陷上原位合成氧化镍纳米颗粒，形成石墨烯/氧化镍复合材料(RG/NiO)。利用X-射线衍射(XRD)，拉曼光谱(Raman)，傅里叶变换红外(FTIR)，扫描电镜(SEM)，透射电镜(TEM)，热重-差热(TGA-DSC)对所制备样品的结构、形貌和NiO含量在复合材料中的含量进行表征。结果表明，热膨胀石墨烯层数约7~8层，层间距约为0.35nm，缺陷多，在水热和微波处理后抗氧化性明显变差。复合材料中氧化镍颗粒平均粒径为25nm，均匀而密集地分散在石墨烯平面上，同时在复合材料中的含量为19.8%。

Microwave-Assisted Synthesis and Characterization of Graphene/NiO Composites Material

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 7~8 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%.