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以钨粉和氧化钨溶胶干粉作为前驱体,通过水热合成以及溶胶凝胶法制备了纳米氧化钨。通过X射线衍射分析仪(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、傅里叶变换红外分光光度计(FT-IR)以及拉曼光谱(Raman)对水热产物进行了表征和分析。XRD表征显示2种结构分别属于单斜和六角相的氧化钨.电镜表征显示水热产物为纳米短棒和纳米长棒结构。为进一步研究水热产物对氧化钨气致变色性能的影响,通过将溶胶与不同晶相纳米结构复合的方式制备出了同源WO3复合薄膜.通过紫外分光光度计测试其气致变色性能。结果表明:单斜相复合薄膜降低了氧化钨的首次致色时间,六角相的复合薄膜保持了很好的气致循环特性。
Tungsten oxide and tungsten oxide sol dry powder as a precursor, prepared by hydrothermal synthesis and sol-gel method of nano-tungsten oxide. Hydrothermal products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR) and Raman spectroscopy Characterization and analysis. XRD characterization showed that the two structures belong to the monoclinic and hexagonal tungsten oxides, respectively. Electron microscopy showed that the hydrothermal products were nanostructured rods and nanorods. To further investigate the effect of hydrothermal products on the gasochromic properties of tungsten oxide, WO3 composite films were prepared by complexing the sol with different crystalline nanostructures. The photochromic properties were measured by UV spectrophotometer. The results show that the monoclinic phase composite film reduces the first lead time of tungsten oxide, and the hexagonal phase composite film maintains good gas cycle characteristics.