Highly pure zinc oxide nanoparticles (ZnO NPs) and graphene-zinc oxide nanocomposites (G-ZnO NCs) were synthesized via chemical precipitation method. The structure, morphology, and composition of the synthesized ZnO NPs and G-ZnO NCs were characterized by using fourier transfer infrared spectroscopy, X-ray diffraction spectroscopy, Raman spectroscopy, scanning electron microscopy and transmission electron microscopy (TEM). The TEM images revealed that the diameter of ZnO NPs is 8–12 nm and homogeneously dispersed onto the surface of graphene sheets. The photocatalytic degradation efficiency of the synthesized G-ZnO NCs against rhodamine-B (Rh-B), methylene blue (MB) and methyl orange (MO) was quantified under visible light irradiation. The irradiation time required for complete removal of the dyes are dependent on dye molecules (MB, MO and Rh-B) and their interaction with the prepared ZnO NPs and G-ZnO NCs. The synthesized NCs were highly efficient for the removal of Rh-B compared to other tested dyes. Hence, the synthesized G-ZnO NCs could be used for environmental dye remediation.

通过化学沉淀法合成了高纯氧化锌纳米颗粒（ZnO NPs）和石墨烯-氧化锌纳米复合材料（G-ZnO NCs）。利用傅里叶转移红外光谱，X射线衍射光谱，拉曼光谱，扫描电子显微镜和透射电子显微镜（TEM）对合成的ZnO NPs和G-ZnO NCs的结构，形态和组成进行了表征。TEM图像显示ZnO NP的直径为8–12 nm，并且均匀地分散在石墨烯片的表面上。在可见光照射下，定量了合成的G-ZnO NCs对若丹明-B（Rh-B），亚甲基蓝（MB）和甲基橙（MO）的光催化降解效率。完全去除染料所需的照射时间取决于染料分子（MB，MO和Rh-B）及其与制备的ZnO NP和G-ZnO NC的相互作用。与其他经过测试的染料相比，合成的NCs在去除Rh-B方面非常高效。因此，合成的G-ZnO NCs可用于环境染料的修复。