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How to Improve Photocatalytic Performance of Yellow Tungsten Oxide?

How to improve photocatalytic performance of yellow tungsten oxide? The researchers proposed a method to improve the photocatalytic performance of yellow tungsten oxide (tungsten trioxide/ WO3). Through this method, WO3 photocatalyst showed higher photocatalytic activity than the single crystal phase WO3in the photocatalytic degradation of water to produce hydrogen and degradation of pollutants.

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The method for improving photocatalytic performance of WO3 mentioned above is to construct heterogeneous junctions. This is also one of the effective methods to improve the efficiency of electron-hole separation of photocatalysts. In recent years, people have successfully constructed WO3/WO3·H2O and other heterogeneous junctions.

WO3 is a polycrystalline phase material with a variety of crystal structures, including orthorhombic phase (m-WO3), hexagonal phase (h-WO3), monoclinic phase and tetragonal crystal. Wherein, m-WO3 has a suitable bandwidth and good visible light responsiveness, so it is widely used in the field of photocatalysis. Moreover, the conduction and valence bands of h-WO3 are lower than those of m-WO3, so it is possible to construct monoclinic/hexagonal heterogeneous junctions (m-WO3/h-WO3) in WO3 materials to improve the photocatalytic performance of yellow tungsten oxide.

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