F-doped cesium tungsten bronze may be used for preparing electrochromic smart window with excellent near-infrared shielding properties, and therefore such smart window may be applied in energy saving reconstruction of building. While do you know how to prepare F doping CsxWO3 with better near-infrared shielding performance? It requires a discussion of the effect of precursor mixing order on F-doping cesium tungsten bronze.
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Experts have found through experiments that the F doped cesium tungsten bronze powder prepared by the mixing order of precursor of "hydrofluoric acid first mixed with tungstic acid" has better near-infrared shielding properties than the mixing order of precursor of "citric acid first mixed with tungstic acid". Wherein, when the hydrofluoric acid is first mixed with tungstic acid, F- ionized by hydrofluoric acid replaces O atom of WO3 to form WO3-yFy. For citric acid mixed with tungstic acid firstly, citrate complexed with the hydrogen bond of WO3 to form a stable complex and hindered F- injection into the WO3 lattice.
