▎ 摘　　要

Hybrid nanostructures containing multiple components have received intensive interests. Herein, we report a solution method for the preparation of Au-ZnO/graphene nanocomposites in which multi-branched Au-ZnO hybrid nanocrystals with ZnO nanorods growing on octahedral Au cores are anchored on graphene. The as-prepared hybrid nanocrystal and nanocomposite samples are characterized by transmission electron microscopy, X-ray diffraction and ultraviolet visible spectroscopy. The photocatalytic activity is investigated by the degradation of Rhodamine B (RhB) under ultraviolet light irradiation. The results show that Au-ZnO/graphene nanocomposites not only have optical absorptions in both UV and visible ranges, but also exhibit much enhanced photocatalytic performance compared to pure Au-ZnO hybrid nanocrystals. (C) 2015 Elsevier B.V. All rights reserved.