Tungsten Oxide Nano-Near-Infrared Absorption Properties

Tungsten oxide nanoparticles is a kind of catalysis, stealth features, electrochromic properties, Gasochromic, photochromic, gas, superconductivity, and many other features versatile semiconductor functional materials. Although so far, related to the electrical properties of tungsten oxide nanoparticles, gas properties and photocatalytic properties have more research, but the optical properties of tungsten oxide nanoparticles and composite semiconductor nanoparticles still fresh.

Prepared by chemical precipitation of nano tungsten oxide powder and mixed with hydrogen and nitrogen gas to restore its processing, analyzing the impact of the reduction treatment temperature on the chemical composition of tungsten oxide, with the X-ray powder diffraction to characterize the crystalline tungsten oxide particles with nanometer and chemical composition, the use of scanning electron microscopy crystal phase morphology of the particles before and after reduction treatment, and measured before and after the nanoparticles by reduction of the resulting gelatinous liquid absorption spectrum from the visible to the near-infrared wavelength range and through spectrum. Studies have shown that: for 1400 ~ 1600nm and 1900 nm to 2200nm band of near-infrared light having a significantly enhanced absorption effect, while a high visible light transmittance, which has a special optical absorption properties of the tungsten oxide nanoparticles after reduction Tungsten oxide is expected to be used in new solar thermal shielding device design.

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