▎ 摘　　要

Graphene was produced from graphene oxide using sodium citrate as the reducing agent under mild conditions. The products were characterized by scanning electron microscopy, X-ray diffraction, ultraviolet visible absorption spectroscopy and Fourier transform infrared spectrometry. Results indicate that the electrical conductivity of graphene oxide was increased by over three orders of magnitude after reduction with sodium citrate, and the obtained graphene showed nonlinear I-V curves.