Bismuth tungstate (Bi2WO6) photocatalyst is considered as a potential excellent visible light photocatalytic material because of its unique electronic structure, excellent visible light absorption ability and high organic degradation ability.

With the rapid development of global economy and the increasing demand for energy and resources, people pay more attention to and invest in the search for renewable and clean energy. Hydrogen energy, as a clean renewable energy, has the advantages of high combustion value, pollution-free, convenient storage and transportation. The photocatalytic decomposition of water to produce hydrogen using solar energy, which has huge reserves and no pollution, provides an ideal method to solve this problem, and has become a hot spot of scientific research.

Tungsten trioxide (WO₃) is an important photocatalytic semiconductor material, which is widely used in the field of semiconductor heterogeneous photocatalytic technology to solve industrial wastewater and domestic wastewater pollution treatment.

Nano-cemented carbide not only has high hardness, good wear resistance, but also has high strength and toughness, and has good comprehensive properties. Its application field is expanding constantly. It has been widely used in manufacturing micro-drills, precision tooling and difficult cutting fields. As the basic raw material of nano-cemented carbide production, nano tungsten carbide has been prepared and its properties for the production of nano-cemented carbide. It has a great influence and has almost become the bottleneck in the production of nano-cemented carbide. For this reason, many enterprises and research institutes in many countries have carried out a lot of research.