Photocatalyst of Copper Modified Violet Tungsten Oxide

With special surface structure and oxygen defect structure, violet tungsten oxide can be modified by copper ions, so as to have better photocatalytic properties. Copper modified violet tungsten oxide, which has a high rate of solar energy utilization, is an efficient photocatalyst.

With the increasingly serious energy and environmental issues, organic pollution of water resources is particularly prominent, not only affects human health, but also consumes a lot of energy to eliminate the pollutants. Therefore, new materials and photocatalytic technology have been developed to solve the pollution.

Since photocatalytic decomposition of water had been found on T₁₂ electrode, researchers have focused on the development of new photocatalytic materials. An ideal photocatalytic material should have low production cost, high secondary use and good photocatalytic property.

A series of oxides as WO₃, T₁₂, ZnO and Fe₂O₃ are used as semiconductor photocatalysts. As band gap energy is not matched to sunlight well, they need to be modified to improve the photocatalytic properties. Method of modifying includes surface sensitization, metal ion doping and so on.

Violet tungsten oxide is an oxide of tungsten. It not only has special surface structure and oxygen defect structure, but can absorb ultraviolet light well. Therefore, violet tungsten oxide can be used as photocatalyst. In addition, copper can increase the response of photocatalyst in the visible region as a doping element. Therefore, violet tungsten oxide can be modified by copper ions to prepare a new kind of photocatalyst. During the preparation process, ammonium meta tungstate is used as tungsten source and copper nitrate is used as copper source. Ammonium nitrate and auxiliary agent are applied as raw materials as well.

The prepared copper modified violet tungsten oxide is nano powder with a diameter of 30-200 nm and a length of 1-3 μm. It is a kind of photocatalytic material with good photocatalytic performance. Copper modified violet tungsten oxide has broad application prospects in the field of photocatalyst. 

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