Photocatalysis, as a new wastewater treatment technology, has shown broad application prospects in the advanced treatment of organic wastewater. In addition, photocatalysts are also widely used in building decoration markets and indoor cars. Photocatalysis process has almost no selectivity for the degradation of organic matter, and can completely mineralize organic pollutants, without secondary pollution.

At present, some new tungstate photocatalytic materials with visible light effect have been discovered by researchers. Semiconductor materials such as tungstate have good application prospects due to their unique structure and physicochemical properties, such as magnetic devices, scintillators, corrosion inhibitors and catalysts, which have become a research hotspot in recent years. For example, the catalytic material Bi₂WO₆ (band gap is only about 2.8eV), which is faster than the visible light response photocatalysis of TIO₂, can mineralize harmful substances such as chloroform and acetaldehyde under visible light, and degrade them into CO₂.

With the increasing problems of energy and environment, the pollution of water resources by organic matter is particularly prominent, which not only affects human health, but also consumes a large amount of energy to eliminate such pollutants. Therefore, the development of new materials using photocatalytic technology to solve pollution has become a new research direction.

Because of its excellent properties such as high hardness, high red hardness, high compressive strength, high wear resistance and good corrosion resistance, superfine tungsten carbide powder is known as "industrial teeth" and widely used in almost all sectors of the national economy and various fields of modern technology. As the main material of cemented carbide, tungsten carbide has been devoted to improving its contradictory properties of hardness and toughness.