Cesium tungsten bronze nanopowder is a new type of environmentally friendly dingal material. It is relatively inexpensive. It contains no toxic elements. And it does not pollute the environment. What is more important, cesium tungsten bronze has high visible light transmittance with strong absorption at wavelengths of greater than 1100 nm. Therefore, nano particle size cesium tungsten bronze is considered to be a smart material that is expected to replace ITO and ATO for the preparation of bedroom thermal insulating film.
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Some experts synthesized the Cs0.32WO3 nanorod-like particles by hydrothermal method using the sodium citrate and cesium carbonate as raw materials, citric acid and D-malic acid as reducing agents. And the experts found that in the hydrothermal synthesis process, when n(Cs)/n(W) is 0.5 in the raw material, the formation of hexagonal Cs0.32WO3 nanoparticles can be promoted. With the increase of reaction time, the morphology of Cs0.32WO3 nanoparticles gradually changed from irregular shape to rod shape. The near-infrared absorption capacity of the obtained Cs0.32WO3 nanoparticles increases with the increase of crystallinity, and greatly increases with the formation of nanorod morphology.
