Vanadium Doped Tungsten Disulfide Nanomaterials

In recent years, tungsten disulfide, a transition metal sulfide, has become a very popular material because of its special layered structure. WS₂ materials have good optical, electrical, lubricating and catalytic properties, and are widely used in fuel cells, solar cells, light-emitting diodes, sensors, lithium-ion batteries, supercapacitors, thermoelectric sensors, lubricants and memory.

At present, the research on doping to improve the performance of semiconductor materials at home and abroad mainly focuses on theoretical calculation, but there are a few studies focused on the preparation of materials and related application properties. For example, Professor Liu Weimin of the Chinese Academy of Sciences has carried out a series of studies on the effect of doping on the tribological properties of WS₂ thin films in vacuum or humid air. The effects of three different metal elements, Cu, Ag and Ni, on the tribological properties of WS₂ thin films have been studied. The experimental results show that doping can significantly improve WS₂ thin films. The antifriction and antiwear properties of the films were prepared by sputtering doped metal materials directly with WS₂. For example, vanadium is doped with tungsten disulfide nanomaterials.

After mixing 0.5g wolframic acid with 10.2mg vanadium powder and 15.2g thiourea, grinding the grinded powder in a mortar for 20 minutes, then loading the grinded powder into the ceramic boat; opening the tubular furnace and entering argon gas at the same time, opening the flange at the outlet of the tubular furnace when the temperature of the tubular furnace rises to 650 degrees C, then rapidly pushing the ceramic boat into the central heat zone of the tubular furnace and sealing the flange with 10 degrees; At the rate of ℃/min, the tube furnace is heated to 950 ℃ and treated at constant temperature for 30 minutes. Then, it is cooled to room temperature naturally to obtain black-grey powder, i.e. Vanadium-doped tungsten disulfide nanosheet material.

The anti-friction and anti-wear properties of vanadium doped tungsten disulfide nanomaterials are much better than those of tungsten disulfide nanosheet films.

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