Photochromic tungsten oxide nanomaterial refers to a doped tungsten oxide nano material synthesized by doping gallium and zinc in tungsten oxide. The molecular formula of the doped tungsten oxide nano material is ZnxGayWO3.
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The preparation of such a reversible photochromic tungsten trioxide nano material comprises the following steps: preparation of raw materials; preparation of precursor solution; hydrothermal reaction; powder calcination. The doped tungsten trioxide nano powder obtained by this method has small particle size, narrow distribution, difficulty in agglomeration, good stability, high purity, low synthesis cost and no pollution, which is suitable for mass production. Experts said that tungsten oxide nanomaterials doping with gallium and zinc can effectively suppress the recombination process of electrons after photoexcitation, thereby greatly increasing the number of photogenerated carriers involved in the color change process and further increasing the color change efficiency of tungsten trioxide.
