Tb doped tungsten trioxide has excellent photocatalytic properties. In order to improve the photochemical stability of tungsten oxide, some experts have added Tb3+ to WO3 by co-precipitation method, which enhanced the crystallinity of tungsten oxide. In this process, a small amount of Tb6WO12 were generated on the surface, which enhanced the absorption of visible light, thereby improving the visible light utilization rate and the degradation rate of Rhodamine B of WO3. In addition, WO3 has enhanced resistance to photo corrosion, which provides a possibility for photocatalytic degradation of organic matter and environmental pollution.
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Experts also said that since 1972, as a new and efficient cleaning technology for catalytic degradation of pollutants, photocatalysis has become a research hotspot in academic circles in recent years. And tungsten trioxide, as an important photocatalyst, has a band gap of 2.5eV, which is smaller than the forbidden band width of TiO2, so the absorption spectrum of sunlight of WO3 is larger than that of TiO2, and can be extended to 500nm. Therefore, in recent years, photocatalytic performance of WO3 has received extensive attention. And therefore, research on the photocatalytic properties of doped tungsten trioxide has also received much attention.
