Tungsten disulfide has a hexagonal layered crystal structure -- the weak bonding between atoms in a single crystal layer and the weak van der Waal’s force between the crystal layers, which makes it both lubricated and conductive and accordingly has a wide range of applications in the field of solid lubrication and electronics.

With the continuous improvement of the power of electronic devices and the miniaturization of devices, the corresponding power density is also increasing, and the problem of heat dissipation is becoming more and more prominent, which puts forward higher requirements for the performance and reliability of heat sink materials.

With the improvement of science and technology level and the progress of human development level, environmental pollution is becoming more and more serious, toxic and difficult to degrade. Pollutants are more and more widespread in the air, which is harmful to biological safety and ecosystem, and restricts the progress of society.

With the rapid development of global industrial technology, environmental pollution has become increasingly serious, which has caused immeasurable harm to people's health and life. Therefore, photocatalytic technology has developed rapidly in recent years. Semiconductor catalysts have attracted extensive attention of scientists for their advantages of simple preparation, low energy consumption and fast degradation.