▎ 摘　　要

Graphene-ZnO nanocomposites were successfully synthesized by a one-step hydrothermal approach, using glucose as a green reducing agent. The in-situ formed hexagonal ZnO particles were randomly decorated on the surfaces of graphene oxide sheets, which were simultaneously reduced directly to form the graphene sheets and the ZnO particles acted as spacers to keep the neighboring sheets separate. Photoluminescence spectra of graphene-ZnO nanocomposites displayed the fluorescence quenching property. Electrochemical tests showed that the graphene-ZnO composite electrodes enhanced the capacitive behavior with higher capacitance values (118 F/g) and better capacitive behavior as compared with pure graphene, which predicted their potential application in energy storage. (C) 2013 Elsevier B.V. All rights reserved.