高速振动球磨对MoS_2/TiO_2纳米微粒的润滑与光催化性能的影响

The Influence of High Speed Vibration Ball Milling on the Lubrication and Photocatalytic Properties of Mo S_2/Ti O_2Nanoparticles

将硫代乙酰胺和钼酸钠在酸性条件下的反应产物Mo S_3沉积在Ti O_2表面上,在不同煅烧温度以及N_2保护气氛下煅烧脱硫后得到纳米Mo S_2/Ti O_2。制备的纳米Mo S_2/Ti O_2经高速振动球磨后分别被用作润滑剂或催化剂,然后考查了球磨时间与煅烧温度对纳米Mo S_2/Ti O_2的润滑和催化性能的影响。结果表明:高速振动球磨可以改善纳米Mo S_2/Ti O_2的润滑性能,随着球磨时间的延长,纳米Mo S_2/Ti O_2的光催化性能也有所提高;较低的煅烧温度有利于改善Mo S_2/Ti O_2的润滑性能与光催化性能;经高速振动球磨之后,纳米Mo S_2/Ti O_2球形微粒出现破碎而导致结构、性质改变,从而对其润滑与光催化性能产生一定的影响。

MoS3 was deposited on TiO2 from the reaction of thioacetamide and sodium molybdate in hydrochloric acid. The obtained MoS2/TiO2 was calcined at different temperatures under a N2 protective atmosphere to obtain the desired nano-MoS2 / TiO2. Some MoS2 / TiO2 samples after high-speed vibration ball were used as lubricants and catalysts, respectively. The influences of ball milling time on the lubrication and catalytic performance of nano-MoS2 / TiO2 were also studied. The results show that the lubricating properties of nano-MoS2 / TiO2 were improved by the high-speed vibration ball milling. With the increase of milling time, the photocatalytic performance of nano-MoS2 / TiO2 was also improved. A low calcination temperature （480℃） is more favorable than 680℃ for improving the lubricating properties and photocatalytic properties of nano-MoS2 / TiO2. The improvement of lubrication and catalysis after high-speed vibration ball milling was ascribed to the morphological change of spherical nano-MoS2 / TiO2.