Small-angle scattering model analysis of cage-like uranyl peroxide nanoparticles
Small-angle scattering model analysis of cage-like uranyl peroxide nanoparticles
复制标题
笼状过氧化铀纳米粒子的小角散射模型分析
DOI：
10.1016/j.molliq.2019.111794
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发表时间：
2019-12
影响因子：
6
通讯作者：
Almasy Laszlo
中科院分区：
文献类型：
--
作者：
Zhang Jianqiao;Tian Qiang;Li Qintang;Henderson Mark Julian;Tuo Xianguo;Yan Minhao;Almasy Laszlo
在水介质中，通过铀酰六方双金字塔的组装，形成具有球形笼状结构的过氧化铀酰纳米颗粒。用小角X射线散射法研究了不同LiOH/UO2摩尔比下制备的过氧铀酰纳米粒子的形貌演变。Guinier分析表明，过氧化铀纳米颗粒的总尺寸随着储存时间的延长而增大。通过对球壳颗粒的模型拟合，进一步分析了它们的结构。粒度分析表明，Li/U = 7.7时，U24粒子在分散中形成；Li/U = 3.1时，U28粒子在分散中生成。随着储存时间的延长，对于Li/U比为5.5和7.7的样品，过氧铀酰纳米颗粒之间的相互作用由排斥转变为吸引，导致其团聚和沉淀。动态光散射证实，在环境条件下，一定数量的大聚集体在分散体中保留了一年以上。这项研究深入了解了过氧化铀酰纳米颗粒的结构演变和相互作用。
Uranyl peroxide nanoparticles (NPs) with spherical cage structure form in aqueous medium by the assembly of uranyl hexagonal bipyramids. Morphological evolution of uranyl peroxide NPs prepared with different LiOH/UO2molar ratios is studied by small-angle X-ray scattering. Guinier analysis indicated that the overall size of the uranyl peroxide NPs increased with storage time. Their structure is further analyzed by model fitting to a spherical shell particle. Analysis of the particle size shows that U24 particles containing 24 uranium atoms are formed in dispersion with Li/U = 7.7, and U28 particles are generated in dispersion with Li/U = 3.1. With increasing storage time, the interactions between uranyl peroxide NPs changes from repulsion to attraction for samples with Li/U ratio 5.5 and 7.7, leading to their agglomeration and precipitation. Certain amount of large aggregates remained in the dispersions in ambient condition for over one year, as confirmed by dynamic light scattering. This study gives insight into the structural evolution and interactions of uranyl peroxide NPs.
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影响因子：
3.4
作者：
A. Mayer
通讯作者：
A. Mayer
影响因子：
15
作者：
P. Podsiadlo;S. Kwon;Bon‐Ryul Koo;Byeongdu Lee;V. Prakapenka;P. Dera;K. Zhuravlev;Galyna Krylova
通讯作者：
P. Podsiadlo;S. Kwon;Bon‐Ryul Koo;Byeongdu Lee;V. Prakapenka;P. Dera;K. Zhuravlev;Galyna Krylova
DOI：
10.1088/1742-6596/351/1/012009
发表时间：
2012-03
期刊：
Journal of Physics: Conference Series
影响因子：
--
作者：
A. I. Kuklin;T. Murugova;O. Ivankov;A. Rogachev;D. Soloviov;Yu. S. Kovalev;A V Ishchenko;A. Zhigunov;T. S. Kurkin;V. Gordeliy
通讯作者：
A. I. Kuklin;T. Murugova;O. Ivankov;A. Rogachev;D. Soloviov;Yu. S. Kovalev;A V Ishchenko;A. Zhigunov;T. S. Kurkin;V. Gordeliy
影响因子：
15
作者：
P. Miró;S. Pierrefixe;M. Gicquel;A. Gil;C. Bo
通讯作者：
P. Miró;S. Pierrefixe;M. Gicquel;A. Gil;C. Bo
影响因子：
16.6
作者：
Burns, PC;Kubatko, KA;Soderholm, L
通讯作者：
Soderholm, L