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从二氧化中形成新的水合酸和酸的形成及其随后的阶段进化

Boris V Kramar¹, Tatiana V Plakhova¹, Anastasiia S Kuzenkova¹

¹Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1/3, 119991 Moscow, Russia. kramarbv@my.msu.ru.

Dalton transactions (Cambridge, England : 2003)

|April 14, 2025

概括

研究人员在纳米级酸缓冲器中探索了二氧化的行为. 热水合成产生了水合酸,酸度影响粒子大小和组成.

科学领域:

无机化学无机化学
材料科学材料科学材料科学
纳米技术纳米技术

背景情况:

二氧化 (ThO2) 纳米粒子对各种应用有兴趣.
了解它们在水溶液中的行为,特别是在热水条件下,对于合成和应用开发至关重要.
酸缓冲器为研究这些材料提供了相关的化学环境.

研究的目的:

在水热条件下的酸盐缓冲器中研究纳米二氧化的行为.
描述由此产生的相位,并了解pH值对其性质的影响.
为了检查合成阶段在化后的转化.

主要方法:

在pH范围内的热水合成 (弱酸到弱基).
使用X射线衍射 (XRD),小角度X射线散射 (SAXS),电子显微镜 (EM),X射线吸收光谱学 (XAS),对分布函数 (PDF) 分析的X射线散射 (TXS),红外光谱学 (IR) 和31P魔术角度旋转核磁共振 (MAS NMR) 进行了表征.
在空气中合成材料的化.

主要成果:

水热合成产生了纳米级的水合双酸相,这是NaTh的变体2(PO4)3.3.
合成pH影响了产品的颗粒大小,元素组成和含量.
化产生NaTh2(PO4) 3和Na2Th(PO4) 2的混合物,其比例取决于初始的pH值和酸盐含量.

结论:

热水介质的酸度是控制-酸相的形成和特性的一个关键因素.
鉴定到的水合相具有能够容纳水和离子的框架结构.
化产品与前体纳米化阶段的pH依赖成分直接相关.

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