Tungsten oxide nanopowder may be used as an infrared ultraviolet shielding material, which is mainly used in heat insulating glass. Compared with low emissivity (low-e) glass, such smart glass of tungsten oxide is generally more economical and environmentally friendly even if low-e glass also has high transmittance to visible light and better infrared shielding rate. However, the price of low-e glass is more than 300RMB per square meter, which is difficult to popularize in ordinary houses.
Besides, tungsten oxide can also be used as a photocatalyst. So, it is necessary to develop different synthesis and modification methods of tungsten oxide to enhance the photocatalytic activity of the tungsten oxide-based photocatalyst. Therefore, it is of great theoretical and practical significance to study how to make tungsten oxide photocatalyst effectively use sunlight and have high photo-generated carrier utilization efficiency.
What is low emissivity?
Low emissivity refers to a surface condition that emits low levels of radiant heat energy. All materials absorb, reflect and emit radiant energy according to Planck's law but here, the primary concern is a special wavelength interval of radiant energy, namely thermal radiation of materials.
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