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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Short-range order of titania doped silica sono-aerogel
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Short-range order of titania doped silica sono-aerogel

机译：二氧化钛掺杂的二氧化硅声-气凝胶的短程有序

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The atomic arrangements around Ti atoms in titania doped silica gels were studied by X-ray absorption spectroscopy. The gels were prepared by ultrasonic treatment of an alkoxide and acidic water mixture (sonogel) and conventionally in alcoholic solution. From the comparison of gels, XANES spectra with those of SrTiO3, anatase and rutile TiO2, an octahedral environment of Ti in the SiO2 network can be inferred. These octahedra are distorted as in the case of TiO2. Ti did not occupy the Si sites but rather accumulated in domains where the Ti atoms are especially abundant. The sonogel network is formed up to the second neighbor level, contrary to the classic gel in which no coordination spheres can be made out above the first neighbor sphere. (C) 1997 Elsevier Science B.V.
机译：通过X射线吸收光谱研究了掺杂二氧化钛的硅胶中Ti原子周围的原子排列。通过对醇盐和酸性水的混合物（sonogel）进行超声处理，并按常规方法在乙醇溶液中制备凝胶。通过比较凝胶，XANES光谱与SrTiO3，锐钛矿和金红石TiO2的光谱，可以推断出SiO2网络中Ti的八面体环境。这些八面体像TiO2一样变形。 Ti并未占据Si位置，而是积累在Ti原子特别丰富的区域中。声凝胶网络形成到第二个相邻层，这与经典的凝胶相反，在经典的凝胶中，不能在第一个相邻球上方形成配位球。 （C）1997年Elsevier Science B.V.

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