Doping Modification Enhances Photocatalytic Degradation of Yellow Tungsten Oxide

By doping modification, yellow tungsten oxide’s photocatalytic degradation can be enhanced. Wherein, metal ion doping is a more common method used. Metal ion doping can improve the surface state of yellow tungsten oxide (WO3) catalysts, inhibit the recombination of photo-generated electrons and holes, and increase surface active groups. Therefore, a detailed study of the effects of metal ion doping on the structure, surface properties and photocatalytic activity of WO3 will help to understand the photocatalytic reaction mechanism and guide the preparation of highly active WO3 photocatalysts.

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Studies have shown that doping of Tb3+ ions can widen frequency range of WO3 light absorption and increase absorption intensity in visible light region, thereby achieving higher visible light utilization and photocatalytic degradation of rhodamine B. Some experts introduced that doping of rare earth ions can improve the performance of WO3 photocatalytic degradation of formaldehyde. The type and amount of doped ions strongly affect the recombination probability and interface charge transfer efficiency of photogenerated e- /h+ on the catalyst surface or crystal lattice. This shows that doping modification can indeed improve the photocatalytic degradation performance of yellow tungsten oxide.

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