Insight into the structure-property relationship of UO2 nanoparticles

被引：15

作者：

Gerber, Evgeny ^{[1
,2
,3
]}

Romanchuk, Anna Yu. ^{[3
]}

Weiss, Stephan ^{[2
]}

Bauters, Stephen ^{[1
,2
]}

Schacherl, Bianca ^{[4
]}

Vitova, Tonya ^{[4
]}

Huebner, Rene ^{[2
]}

Shams Aldin Azzam, Salim ^{[2
]}

Detollenaere, Dirk ^{[5
,6
]}

Banerjee, Dipanjan ^{[6
,7
]}

Butorin, Sergei M. ^{[8
]}

Kalmykov, Stepan N. ^{[3
]}

Kvashnina, Kristina O. ^{[1
,2
,3
]}

机构：

[1] The Rossendorf Beamline ESRF European Synchrotron, CS40220, F-38043 Grenoble 9, France

[2] Helmholtz Zentrum Dresden Rossendorf HZDR, Inst Resource Ecol, POB 510119, D-01314 Dresden, Germany

[3] Lomonosov Moscow State Univ, Dept Chem, Moscow 119991, Russia

[4] Karlsruhe Inst Technol, Inst Nucl Waste Disposal INE, POB 3640, D-76021 Karlsruhe, Germany

[5] Univ Ghent, Xray Imaging & Microspect Res Grp, Dept Chem, Ghent, Belgium

[6] European Synchrotron Radiat Facil, Dutch Belgian Beamline DUBBLE, 71 Ave Martyrs,CS 40220, F-38043 Grenoble 9, France

[7] Katholieke Univ Leuven, Dept Chem, Celestijnenlaan 200F,Box 2404, B-3001 Leuven, Belgium

[8] Uppsala Univ, Dept Phys & Astron, Mol & Condensed Matter Phys, POB 516, Uppsala, Sweden

来源：

INORGANIC CHEMISTRY FRONTIERS | 2021年 / 8卷 / 04期

基金：

瑞典研究理事会; 欧洲研究理事会;

关键词：

D O I：

10.1039/d0qi01140a

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Highly crystalline UO2 nanoparticles (NPs) with sizes of 2-3 nm were produced by fast chemical deposition of uranium(iv) under reducing conditions at pH 8-11. The particles were then characterized by microscopy and spectroscopy techniques including high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), high-energy resolution fluorescence detection (HERFD) X-ray absorption spectroscopy at the U M-4 edge and extended X-ray absorption fine structure (EXAFS) spectroscopy at the U L-3 edge. The results of this investigation show that despite U(iv) being the dominant oxidation state of the freshly prepared UO2 NPs, they oxidize to U4O9 with time and under the X-ray beam, indicating the high reactivity of U(iv) under these conditions. Moreover, it was found that the oxidation process of NPs is accompanied by their growth in size to 6 nm. We highlight here the major differences and similarities of the UO2 NP properties to PuO2, ThO2 and CeO2 NPs.

引用

页码：1102 / 1110

页数：9

共 77 条

[61] Coprecipitation of thorium with UO2 [J].