Yellow Tungsten Oxide Applied for Photocatalytic Water Splitting

In recent years, semiconductor photocatalytic research has developed rapidly. Wherein, yellow tungsten oxide (tungsten trioxide /WO3) has become more and more attractive as a photocatalyst. Tungsten trioxide catalyst has the advantages of stable catalytic performance, no secondary pollution, no photo-corrosion and no toxicity. Therefore, it is widely used in photocatalytic water splitting. Some experts researched the photocatalytic activity of WO3 and found that the optimal oxygen production of WO3 is about 79.9 μmol/(L·h) under visible light radiation.

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Studies have shown that the physical and chemical properties of yellow tungsten oxide such as crystal phase, degree of crystallization, specific surface area, carrier separation ability and light absorption ability, etc., greatly affect its photocatalytic activity. Doping modification of WO3 catalyst can improve its photocatalytic performance. Most common modification methods use noble metals and transition metals for doping, and there are few reports on doping of rare earth elements. In a word, noble metal doping, transition metal doping, and rare earth element doping can all improve the photocatalytic activity of yellow tungsten oxide for photocatalytic water splitting.

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