Yellow tungsten oxide applied for photocatalytic degradation is known as tungsten trioxide or WO3, which has the characteristics of a small forbidden band width. And the absorption edge of WO3 extends into the visible light region. So, tungsten trioxide exhibits good photocatalytic degradation effect under visible light irradiation.
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Yellow tungsten oxide is a semiconductor oxide photocatalytic material, so it can be applied in semiconductor oxide photocatalytic technology - a new type of technology on improving environmental pollution, which has advantages of simple treatment process, the use of abundant solar energy, and no secondary pollution. So this technology has broad application prospects in the advanced treatment of domestic water and industrial sewage. In addition, yellow tungsten oxide is promising in fabrication of smart windows, and NO2 sensors, etc., thereby it is well-known as an important dingal material, to save energy, reduce CO2 pollution, and monitor environ meal data.
