In recent years, the appearance of nano material artificial analogy peroxidase can effectively overcome the above shortcomings of natural enzyme, showing strong catalytic activity and specificity. The quantum size effect, small size effect, interface effect, surface effect and macro quantum tunneling effect of nano tungsten oxide make it have more advantages in optical, magnetic, catalytic and chemical activities. Based on the quantum effect, quantum dots have a wide range of applications in solar cells, light-emitting devices, optical biomarkers and other fields.

The photoelectrochemical cell (PEC), which decomposes water to produce hydrogen and converts solar energy into chemical energy, is considered to be one of the most important ways to obtain energy instead of fossil energy. It is an important research direction in this field to find and study potential semiconductor materials by various methods.

As the name implies, violet tungsten oxide refers to a kind of tungsten oxide with a violet color. It is one of the stable oxides of tungsten, together with WO₃, WO_2.90 and WO₂. Why violet tungsten oxide is violet. It is closely related to its light absorption property.

Violet tungsten oxide of a dark purple to pure purple color is one of the four stable oxides of tungsten. It is composed of tungsten copper, tungsten trioxide and other different components. And the components and their quantities depend on the specific preparation method.

Tungsten disulfide does exist in nature, but the quantity is very rare. Therefore, tungsten disulfide is usually prepared by various chemical methods. Preparation methods of tungsten disulfide include hydrothermal method, mechanical stripping method, chemical vapor deposition method and so on.

Tungsten disulfide has high application value in the lubrication of rotating shaft in notebook. It can not only improve the lubricating performance and wear resistance of rotating shaft itself, but extend its service life, reducing the failure rate of notebook greatly.

Tungsten disulfide with good lubricating performance is suitable for the working environment of high temperature and heavy load. Therefore, it has high application value in the lubrication of cylindrical roller bearing. It can not only reduce the wear on bearing surface, but improve the service life of the bearing.

Tungsten disulfide is an ideal material for bearing lubrication. It is suitable for the working environment of heavy load, and can form a dense protective film of tungsten trioxide on bearing surface under high temperature, so as to reduce the wear.

Tungsten disulfide has high application value in the lubrication of deep groove ball bearing with its excellent corrosion resistance. It provides maximum corrosion protection for this kind of part, which works under high temperature and heavy load. It is an efficient multifunctional material.

Tungsten disulfide will form a dense protective film of tungsten trioxide under high temperature, which plays a role of lubrication. Therefore, this kind of material is used in bearing lubrication to reduce the surface wear and improve the service life of bearing.