Spherical nano tungsten disulfide can be prepared by hydrothermal method using ionized water as a solvent, sodium tungstate and thiourea, along with hydroxylamine hydrochloride as reducing agent and CTAB as surfactant. It is a simple and cheap preparation method.

As an efficient preparation method of tungsten disulfide (WS2), high pressure synthesis has attracted more and more attention. The preparation process is simple, low-cost and environmentally friendly. And the prepared tungsten disulfide usually has high density, crystallinity and good symmetry.

Tungsten disulfide is a new kind of photocatalyst that has high photocatalytic activity. Such a photocatalyst can be widely used in photocatalytic water-splitting for hydrogen production, because it can effectively improve the utilization of solar energy and hydrogen production rate under visible light.

Radio frequency sputtering is a common and simple method for preparing tungsten disulfide film that has good compact and coating binding force. And in the preparation process, tungsten disulfide target is discharged continuously by radio frequency excitation in inert gas.

Reactive magnetron sputtering is a common and easy method for preparing tungsten disulfide film with high melting point. The preparation process involves the reactive deposition of atoms sputtered from tungsten targets and sulfur ions that produced by hydrogen sulfide (H2S).

Nano tungsten disulfide can be prepared under high temperature and self-pressurization. During the preparation process, WO3 sol, dispersant DMSO and sublimed sulfur are reacted at 900°C. And nano tungsten disulfide with different morphologies can be prepared by controlling the preparation temperature.

Nano tungsten disulfide is usually used as lubricant additive to improve the lubricating performance of original lubricating oil. However, it is prone to agglomeration during the addition, which is closely connected with its small particle size and high surface energy.

Tungsten disulfide is applied in dye-sensitized solar cell as counter electrodes, being considered as a potential material to replace the traditional Pt electrode. Such a dye-sensitized solar cell has high photoelectric transformation efficiency.

To prepare tungsten disulfide lubricant for isothermal forging, three steps are needed: take the compositions of emulsion according to proportion, disperse the compositions uniformly and add nano tungsten disulfide into the emulsion. The preparation process is strict but easy.

Tungsten disulfide lubricant used in isothermal forging is formed by adding nano tungsten disulfide to emulsion. It is a kind of new lubricating material with injection performance, insulating performance, lubricating performance and mold unloading performance.