Doped yellow tungsten oxide, also known as doped tungsten trioxide, is a good catalyst. Compared with the common yellow tungsten oxide, the photoelectric conversion efficiency and photoelectric catalytic activity of the doped tungsten trioxide have been improved. For example, Fe is doped to form Fe2O3 and Fe3+ can capture the photo electron, which inhibits the recombination of electron and hole.
Doping is an important method. It can improve the efficiency of photoelectric conversion and the ability of photoelectric catalysis.
Doped yellow tungsten oxide also has good sensitivity to detect gas. Compared with the single tungsten trioxide, its sensitivity, response speed and selectivity are all improved. So, it is necessary to modify the yellow tungsten oxide to get better gas sensing property.
Doped yellow tungsten oxide with trace amount of precious metals such as gold, platinum or palladium is good gas sensitive material with fast response to gases, such as H2S gas.
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