Yellow tungsten oxide, which is also known as tungsten trioxide or WO3, is an n-type semiconductor material with excellent performance and wide use. For example, yellow tungsten oxide can be used as a photocatalyst that has broad application prospects in photolysis of water and degradation of organic and inorganic pollutants in the atmosphere and water.
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According to reports, although yellow tungsten oxide has lower light energy conversion efficiency than titanium dioxide, high-purity yellow tungsten oxide has a simple preparation process, has strong absorption of light in the region close to ultraviolet light and visible light, and can be used in various electrolytes to maintain stable characteristics for a long time under light. However, the amount of oxygen vacancies in the preparation of tungsten trioxide is uncertain, and the crystal form is complicated, making the photocatalytic activity of tungsten trioxide unstable, thereby greatly limiting the application of tungsten trioxide photocatalyst.
