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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 >Synthesis and characterization of a low-density urania (UO3) aerogel
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Synthesis and characterization of a low-density urania (UO3) aerogel

机译：低密度尿素（UO3）气凝胶的合成与表征

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We report the synthesis and characterization for the first example of a low-density urania aerogel. The monolithic aerogels were prepared through the sol-gel polymerization of hydrated uranyl nitrate in ethanol using propylene oxide as a gelation initiator. The dried UO3 aerogel was characterized by high-resolution transmission electron microscopy and nitrogen adsorption/desorption analyses. The aerogel micro-structure was determined to be composed of primary particles with two distinct morphologies (spherical and fibrous) with features in the 5-20 nm range. These particles were also determined to be highly crystalline as evidenced by the higher-magnification TEM examination. The urania aerogel possesses high surface area (236 m(2)/g) and pore diameters in the micro- and mesoporous (2-20 nm) range. (C) 2003 Elsevier Science B.V. All rights reserved. [References: 18]
机译：我们报告了低密度尿烷气凝胶的第一个例子的合成和表征。通过使用环氧丙烷作为胶凝引发剂，在乙醇中水合硝酸铀酰的溶胶-凝胶聚合反应制备整体式气凝胶。干燥的UO3气凝胶通过高分辨率透射电子显微镜和氮吸附/解吸分析进行了表征。确定气凝胶的微结构由具有两种不同形态（球形和纤维状）且特征在5-20 nm范围内的初级粒子组成。这些颗粒也被确定为高度结晶的，这是通过更高倍率的TEM检查所证明的。尿烷气凝胶具有高表面积（236 m（2）/ g），孔径在微孔和中孔（2-20 nm）范围内。 （C）2003 Elsevier Science B.V.保留所有权利。 [参考：18]

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