▎ 摘　　要

In this work, we developed a facile and effective hydrothermal method synthesis of MoSe2 nanoflowers on reduced graphene oxide (RGO) sheets. The as-prepared MoSe2/reduced graphene oxide (MoSe2/RGO) composites are characterized by X-ray diffractometer (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results indicated that MoSe2 nanoflowers were successfully deposited on RGO nanosheets to form a well interconnected hybrid structure. The tribological properties of MoSe2/RGO composites as lubricating oil additive were investigated by a UMT-2 ball-on-plate friction and wear tester. By the addition of MoSe2/RGO composites in paraffin oil, the antiwear ability was improved and the friction coefficient was decreased. The based oil with MoSe2/RGO composites showed better tribological properties than the oil with MoSe2 and pure oil. The good friction and wear properties of MoSe2/RGO composites as additives were attributed to the formation of a thin physical tribofilm on the substrate.