▎ 摘　　要

Reduced graphene oxide/molybdenum disulfide (RGO/MoS2) heterostructures were fabricated by a facile and effective hydrothermal method, and the tribological properties of the heterostructures were investigated under vacuum environment. X-ray diffraction, Energy Dispersive Spectrometer, X-ray photoelectron spectrometer and Raman spectrum analysis proved that MoS2 and RGO were coexisted by the chemical bonding with high purity. Scanning electron microscopy and transmission electron microscope tests show that the MoS2 exhibited layer form and well dispersed on RGO nanosheets. The tribological properties of RGO/MoS2 heterostructures were systematically investigated under different conditions in vacuum environment compare to pure MoS2, and the results indicated that the friction-reducing and anti-wear abilities of RGO/MoS2 heterostructures were enhanced obviously. The improvement of tribological properties for RGO/MoS2 heterostructures was endowed with the excellent traction and support effects of RGO nanosheets during the friction process. This work highlights a pathway to expand potential applications of MoS2, and RGO based materials in vacuum tribological field.