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Insight into the structure-property relationship of UO2 nanoparticles

Gerber, Evgeny (author)
The Rossendorf Beamline ESRF European Synchrotron, CS40220, F-38043 Grenoble 9, France; Helmholtz Zentrum Dresden Rossendorf HZDR, Inst Resource Ecol, POB 510119, D-01314 Dresden, Germany; Lomonosov Moscow State Univ, Dept Chem, Moscow 119991, Russia
Romanchuk, Anna Yu. (author)
Lomonosov Moscow State Univ, Dept Chem, Moscow 119991, Russia
Weiss, Stephan (author)
Helmholtz Zentrum Dresden Rossendorf HZDR, Inst Resource Ecol, POB 510119, D-01314 Dresden, Germany
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Bauters, Stephen (author)
The Rossendorf Beamline ESRF European Synchrotron, CS40220, F-38043 Grenoble 9, France; Helmholtz Zentrum Dresden Rossendorf HZDR, Inst Resource Ecol, POB 510119, D-01314 Dresden, Germany
Schacherl, Bianca (author)
Karlsruhe Inst Technol, Inst Nucl Waste Disposal INE, POB 3640, D-76021 Karlsruhe, Germany
Vitova, Tonya (author)
Karlsruhe Inst Technol, Inst Nucl Waste Disposal INE, POB 3640, D-76021 Karlsruhe, Germany
Hübner, Rene (author)
Helmholtz Zentrum Dresden Rossendorf HZDR, Inst Resource Ecol, POB 510119, D-01314 Dresden, Germany
Shams Aldin Azzam, Salim (author)
Helmholtz Zentrum Dresden Rossendorf HZDR, Inst Resource Ecol, POB 510119, D-01314 Dresden, Germany
Detollenaere, Dirk (author)
Univ Ghent, Xray Imaging & Microspect Res Grp, Dept Chem, Ghent, Belgium; European Synchrotron Radiat Facil, Dutch Belgian Beamline DUBBLE, 71 Ave Martyrs,CS 40220, F-38043 Grenoble 9, France
Banerjee, Dipanjan (author)
European Synchrotron Radiat Facil, Dutch Belgian Beamline DUBBLE, 71 Ave Martyrs,CS 40220, F-38043 Grenoble 9, France; Katholieke Univ Leuven, Dept Chem, Celestijnenlaan 200F, Box 2404, B-3001 Leuven, Belgium
Butorin, Sergei M. (author)
Uppsala universitet,Molekyl- och kondenserade materiens fysik
Kalmykov, Stepan N. (author)
Lomonosov Moscow State Univ, Dept Chem, Moscow 119991, Russia
Kvashnina, Kristina O. (author)
The Rossendorf Beamline ESRF European Synchrotron, CS40220, F-38043 Grenoble 9, France; Helmholtz Zentrum Dresden Rossendorf HZDR, Inst Resource Ecol, POB 510119, D-01314 Dresden, Germany; Lomonosov Moscow State Univ, Dept Chem, Moscow 119991, Russia
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 (creator_code:org_t)
2021
2021
English.
In: Inorganic Chemistry Frontiers. - : Royal Society of Chemistry (RSC). - 2052-1545 .- 2052-1553. ; 8:4, s. 1102-1110
Related links:
https://doi.org/10.1...
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • 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 M4 edge and extended X-ray absorption fine structure (EXAFS) spectroscopy at the U L3 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.

Subject headings

NATURVETENSKAP  -- Kemi -- Materialkemi (hsv//swe)
NATURAL SCIENCES  -- Chemical Sciences -- Materials Chemistry (hsv//eng)

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