中文摘要：

采用氧化石墨和七水合硫酸锌作为初始反应物,在低温下（80℃）合成了氧化石墨/ZnO,然后通过低温剥离法制备了高质量石墨烯/ZnO（GNS/ZnO）复合材料.采用X射线衍射（XRD）、傅里叶变换红外（FTIR）光谱、热重分析仪（TG）、X射线光电子能谱（XPS）、拉曼光谱（RS）、扫描电子显微镜（SEM）和透射电子显微镜（TEM）等分析手段对石墨烯/ZnO样品进行了表征.结果表明：氧化石墨还原彻底,纳米ZnO成功地负载到了石墨烯上,有效地减少了石墨烯片层间的团聚现象.通过对ZnO和石墨烯/ZnO荧光性能测试,结果表明：石墨烯/ZnO发生了荧光淬灭现象,在光电子领域拥有广阔的应用前景.

英文摘要：

Graphite oxide/ZnO was prepared at low temperature（80℃） with graphite oxide（GO） and zinc sulfate heptahydrate（ZnSO4.7H2O） as initial reactants.The graphene/ZnO（GNS/ZnO） was then prepared by a low-temperature chemical exfoliation method.The as-prepared GNS/ZnO was characterized by X-ray diffraction（XRD）,Fourier transform infrared spectroscope（FT-IR）,thermo-gravimetric analysis（TG）,X-ray photoelectron spectroscopy（XPS）,Raman spectra（RS）,scanning electron microscope（SEM） and transmission electron microscope（TEM）,respectively.The results indicate that GO is completely reduced to graphene and the well-dispersed ZnO nanoparticles are successfully deposited on graphene sheets as spacers to keep the neighboring sheets separate.Photoluminescence spectra of ZnO and GNS/ZnO nanocomposites display the fluorescence quenching property of GNS/ZnO,implying that the GNS/ZnO nanocomposites are expected for practical use in the field of photoelectronics.