▎ 摘　　要

The synthesis of three-dimensional (3D) graphene with petroleum asphalt as a carbon source by chemical vapor deposition on a Ni foam substrate has been studied. The morphology and properties of three-dimensional graphene synthesized from asphalt were characterized by scanning electron microscopy, transmission electron microscopy, Raman spectroscopy and X-ray diffraction. The results demonstrate that most of as-prepared 3D graphene foams have 2-5 layers, and small amounts of them have sheets more than 5 layers. The hydrocarbon fragments in asphalt consist of planar aromatic ring structures are considered to play a key role during the formation of 3D graphene. The results demonstrate that asphalt is one of the suitable starting carbon sources for making 3D graphene networks. (c) 2014 Elsevier B.V. All rights reserved.