Nanostructure materials have attracted much attention in the last few years due to their unique properties that are different from the bulk materials. ZnO/GrO nanoparticles were synthesized with a simple surfactant free microwave route. ZnO nanostructures as an important semiconductor with wide bandgap (3.6 eV) has been widely used for the light emitting diodes, The effects of different parameters such as type of zinc precursor, time and power of irradiation on the morphology and particle size of the samples have been investigated. In this paper we report a simple and rapid microwave method for preparation of ZnO/GrO nanoparticles. Nanostructures were synthesized from reaction between zinc acetate and graphene powder. The effects of different parameters such as power of oven and time of irradiation were also studied. Finally, the efficiency of ZnO/GrO nanostructures as a optical investigation using photoluminescence spectrum irradiation has been evaluated. ZnO/GrO nanostructures were characterized by means of X-ray diffraction, Atomic-force microscopy, scanning electron microscopy, Fourier transform infrared and photoluminescence spectroscopy.