甘氨酸诱导h-WO3的简单液相合成及其光致变色性能的研究
Glycine-assisted facile aqueous synthesis and photochromic performance of h-WO3
以钨酸钠和盐酸为原料，甘氨酸为诱导剂，通过简单的水溶液法合成出了由一维纳米单元组装而成的类球状h-WO3分级结构。使用XRD，SEM等手段对样品进行结构和形貌表征，发现酸量的多少对样品的最终相态起到了重要的作用，只有在WO42?/H+的摩尔比为1:4.5～1:5的范围内才可以得到纯的h-WO3。突破了h-WO3的合成需要高温高压这一难题，并对甘氨酸的作用机理进行了深入的探讨。在酸性氛围中，甘氨酸可以迅速发生质子化，与WO42?结合生成亚稳相WO3晶核。甘氨酸的引入在提升了样品光的吸收能力的基础上，增强了其可见光致变色性能。
化学材料科学晶体学
h-WO3亚稳相晶体生长甘氨酸光致变色
赵亚红,赵艳,刘琴秀,杨令,赵敬哲.甘氨酸诱导h-WO3的简单液相合成及其光致变色性能的研究[EB/OL].(2017-06-02)[2025-10-01].http://www.paper.edu.cn/releasepaper/content/201706-45.点此复制
Near-spherical metastable tungsten oxide was successfully synthesised via a facile glycine-assisted aqueous approach between Na2WO4o2H2O and glycine in HCl solution. The samples were characterized by XRD, SEM. The mount of acid was found to be a crucial factor for the final phase of the synthesized WO3 architectures. The pure h-WO3 can get only when the ratio of WO42?/H+ was 1:4.5～1:5.Solved the problem of synthesizingof h-WO3 under high temperature and high pressure.Then the effect mechanism of glycine was discussed.Glycinein the reaction system facilitated the appearance of metastable phase h-WO3 nuclei through electrostatic interaction between protonated ion and tungstate anion. Especially, the introduction of glycine in the sample improved its absorptive capacity to the visible-light andtheir photochromic performances.
h-WO3metastablecrystal growthglycinephotochromic
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