How to prepare WO3 hollow sphere? The experts have proposed a method for preparing WO3 hollow spheres at a lower temperature. This method can improve the utilization rate of WO3 catalyst to the light source, thereby reducing the cost.

Yellow tungsten oxide applied for photocatalytic degradation is known as tungsten trioxide or WO3, which has the characteristics of a small forbidden band width. And the absorption edge of WO3 extends into the visible light region. So, tungsten trioxide exhibits good photocatalytic degradation effect under visible light irradiation.

Yellow tungsten oxide as a photocatalytic material can be used to produce hydrogen by photolysis of water. According to the experts, the photocatalytic material used for hydrogen production from photolysis of water should have good light corrosion resistance, electrolyte corrosion resistance, as well as a suitable forbidden band width.

Nano yellow tungsten oxide, or nano tungsten trioxide or nano WO3, is a new type of nano material that can be applied for pollutant adsorption. The particle size of tungsten trioxide is very small, so it has a large specific surface area, which makes it have good physical adsorption and chemical adsorption properties. In addition, WO3 is an acidic oxide, and its surface has acidic properties, thereby it can effectively adsorb basic dyes and heavy metal ions.