▎ 摘　　要

ZnO nanoparticles (NPs) were decorated on a graphene oxide (GO) sheet via the sol gel method in a gelatin medium. Long-chain gelatin compounds were utilized to terminate the growth of the ZnO-NPs on GO and stabilize them. The obtained products were post-annealed at 400 degrees C to remove the gelatin and produce a reduced graphene oxide (RGO) sheet. Microscopic studies showed that the NPs were dispersed on the GO sheet. They had a spherical shape and a size of approximately 19 urn. In addition, these studies revealed that the NPs were single crystals. The X-ray diffraction pattern of the NPs indicated a hexagonal (wurtzite) structure. The results of Fourier transform infrared spectroscopy (FTIR) revealed that the GO sheet was transformed into RGO by the post-annealing process. The obtained ZnO-NPs/RGO nanocomposite was used as photocatalyst to remove methylene blue (MB). Observations showed that the efficiency of the photocatalyst activity of the ZnO NPs was significantly increased by RGO. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.