TEMPLATE-FREE SYNTHESIS OF MoSe2 HOLLOW NANOSPHERES WITH EXCELLENT TRIBOLOGICAL PROPERTIES

Novel MoSe2 hollow nanospheres with diameter similar to 50 nm, consisted of 3 similar to layered structure MoSe2 nanosheets, were successfully synthesized by a facile one-step hydrothermal method using selenium powders and ammonium molyb date as raw materials. The as-prepared products were characterized using X-ray diffraction (XRD), energy dispersive spectroscopy (EDS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM); UMT-2 tribotester was used to assess their lubricating effect when used as additives in base oil dispersions. And the topography of worn scars was measured using a BRUKER Contour GT non-contact 3D optical profile testing instrument. Tribological performance showed that the obtained MoSe2 hollow nanospheres possessed anti-wear and friction-reducing properties as a lubrication additive compared with pure base oil, which will deform and exfoliateand enter into the interface with base oil, then form tribofilmon rubbing surface, enhancing the tribological properties.