In recent years, with the indoor air pollution indoor closed decoration and decoration materials, serious harm to human health, attracted the attention of the people, for the indoor air pollution is becoming more and more serious, for all kinds of indoor air purification technology has emerged, many people do not know, tungsten can not only be used for photocatalytic purification of wastewater, can also be used to air purification.

With the economic and social development, nuclear technology has been widely used in the fields of medical, nuclear industry and national defense, has brought enormous economic benefits and social benefits at the same time, the nuclear radiation of human exposure to a variety of opportunities, potential threat to human health and environmental safety. 

In modern industrial production, ultrafiltration membrane is a commonly used filter product. Membrane separation technology is a new and efficient separation technology. It can meet the needs of modern industrial energy saving, improving production efficiency, reusing raw materials and eliminating environmental pollution.

The traditional semiconductor photocatalyst TiO₂, ZnO and other large band gap, can only absorb UV light, the low utilization rate of the light of the sun, has seriously hindered the practical application of photocatalytic technology, bismuth tungstate is a new type of catalyst with visible light, the band gap is small, light absorption ability, easy modification, and it gradually become the traditional photocatalyst product upgrades.

Photocatalytic degradation of environmental pollutants has attracted increasing attention due to its outstanding advantages such as low energy consumption, mild reaction conditions, easy operation, and reduced secondary pollution. Bismuth tungstate is a new type of visible light catalyst. Its band gap is small, its light absorption ability is strong, and it is easy to modify. It is becoming the main product of photocatalyst.

Bismuth tungstate is a new type of visible light catalyst. Its band gap is small, its absorption light is strong and easy to be modified. Co₃O₄ and Bi₂WO₆ are combined into a composite photocatalyst of bismuth cobalt tungstate with a hydrothermal synthesis method, and the photocatalytic performance is greatly improved. The process of synthesis is: