Tungsten disulfide (WS₂) is a kind of layered solid lubricant with structure similar to graphite. It has excellent high temperature resistance, extreme pressure resistance, good adsorption capacity on metal surface and low thermal conductivity. WS₂ was first applied to the lubrication of the key parts of the American mariner spacecraft, and it was used to prepare high temperature extreme pressure grease and energy-saving engine lubricating oil, with good application results.

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.

At present, China's major cities are booming in the construction of rail transit projects. Because of its unparalleled advantages, shield method has been widely used in the construction of rail transit tunnels.

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.