论文部分内容阅读
The tribological and photocatalytic properties of two kinds of nano-MoS2,namely nano-sphere and nano-platelet,were investigated.The results showed that MoS2 nano-spheres could not work in the powder-lubrication manner,whereas MoS2 nano-platelets represented a stable lubricating performance.Moreover,MoS2 nano-platelets also revealed a better catalytic activity in the degradation reaction of malachite green as compared to MoS2 nano-spheres.The amount of nano-spheres with a low BET area in the contact area was not enough to lubricate the steel friction pair.However,MoS2 nano-platelets with a high BET area could well function as a powder lubricant.MoS2 nano-spheres with a layer-closed structure only provided the basal surface,whereas MoS2 nano-platelets offered the active rim-edge surface in the catalytic degradation of malachite green.Moreover,the high BET area also improved the catalytic activity of MoS2 nano-platelets.Thus,the nano-platelets revealed higher catalytic activity than the nano-spheres.The findings indicated MoS2 nano-platelets have potential applications in powder lubrication and photocatalysis.