“Three wastes” pollution produced in the preparation of tungsten disulfide, harming the human health and environment. They are tungsten-containing residue, acid-containing liquor and hydrogen sulfide together with other gases. They deserve our attention.

Composite of tungsten disulfide and graphene, with two-dimensional structure, has high catalytic activity and excellent electro-catalytic properties. It has broad application prospects in the field of full cell and is regarded as a material to replace the traditional electrocatalyst.

Cations in ionic liquid form a cation layer around spherical tungsten disulfide particles to prevent their contact. In this way, ionic liquid can effectively disperse spherical tungsten disulfide in lubricating oil.

Nanocomposite of polypyrrole and tungsten disulfide can be prepared by inserting polypyrrole into tungsten disulfide layers. Usually, the peeling-recomposition technology and monomer intercalation method are applied in this simple preparation method.