▎ 摘　　要

This article describes the preparation of graphene oxide sheet by ball milling of graphite oxide (prepared by modified Hummer's method) using water as the medium. The structure and properties of the graphene oxide sheet samples were characterised by Fourier transform infrared spectroscopy, X-ray diffraction, Raman, X-ray photoelectron spectroscopy and SEM. The results indicated that the alignment of graphite oxide degraded as the duration of ball milling increased. The graphite oxide was completely exfoliated after being ball-milled for 30 h and graphene oxide sheet were obtained. Also, it was found that the oxygen-containing functional groups such as carbonyl and epoxy groups on the surface of graphene oxide sheet could be effectively removed by ball milling through its mechanochemical effect. In summary, the proposed ball milling method is a facile and effective method for graphene oxide sheet preparation.