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Sökning: onr:"swepub:oai:DiVA.org:uu-423355" > The missing pieces ...

The missing pieces of the PuO2 nanoparticle puzzle

Gerber, Evgeny (författare)
ESRF European Synchrotron, Rossendorf Beamline, 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 (författare)
Lomonosov Moscow State Univ, Dept Chem, Moscow 119991, Russia.
Pidchenko, Ivan (författare)
ESRF European Synchrotron, Rossendorf Beamline, CS40220, F-38043 Grenoble 9, France.;Helmholtz Zentrum Dresden Rossendorf HZDR, Inst Resource Ecol, POB 510119, D-01314 Dresden, Germany.
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Amidani, Lucia (författare)
ESRF European Synchrotron, Rossendorf Beamline, CS40220, F-38043 Grenoble 9, France.;Helmholtz Zentrum Dresden Rossendorf HZDR, Inst Resource Ecol, POB 510119, D-01314 Dresden, Germany.
Rossberg, Andre (författare)
ESRF European Synchrotron, Rossendorf Beamline, CS40220, F-38043 Grenoble 9, France.;Helmholtz Zentrum Dresden Rossendorf HZDR, Inst Resource Ecol, POB 510119, D-01314 Dresden, Germany.
Hennig, Christoph (författare)
ESRF European Synchrotron, Rossendorf Beamline, CS40220, F-38043 Grenoble 9, France.;Helmholtz Zentrum Dresden Rossendorf HZDR, Inst Resource Ecol, POB 510119, D-01314 Dresden, Germany.
Vaughan, Gavin B. M. (författare)
ESRF European Synchrotron, CS40220, F-38043 Grenoble 9, France.
Trigub, Alexander (författare)
Natl Res Ctr, Kurchatov Inst, Moscow 123182, Russia.
Egorova, Tolganay (författare)
Lomonosov Moscow State Univ, Dept Chem, Moscow 119991, Russia.
Bauters, Stephen (författare)
ESRF European Synchrotron, Rossendorf Beamline, CS40220, F-38043 Grenoble 9, France.;Helmholtz Zentrum Dresden Rossendorf HZDR, Inst Resource Ecol, POB 510119, D-01314 Dresden, Germany.
Plakhova, Tatiana (författare)
Lomonosov Moscow State Univ, Dept Chem, Moscow 119991, Russia.
Hunault, Myrtille O. J. Y. (författare)
Synchrotron SOLEIL, St Aubin BP 48, F-91192 Gif Sur Yvette, France.
Weiss, Stephan (författare)
Helmholtz Zentrum Dresden Rossendorf HZDR, Inst Resource Ecol, POB 510119, D-01314 Dresden, Germany.
Butorin, Sergei (författare)
Uppsala universitet,Molekyl- och kondenserade materiens fysik
Scheinost, Andreas C. (författare)
ESRF European Synchrotron, Rossendorf Beamline, CS40220, F-38043 Grenoble 9, France.;Helmholtz Zentrum Dresden Rossendorf HZDR, Inst Resource Ecol, POB 510119, D-01314 Dresden, Germany.
Kalmykov, Stepan N. (författare)
Lomonosov Moscow State Univ, Dept Chem, Moscow 119991, Russia.;Natl Res Ctr, Kurchatov Inst, Moscow 123182, Russia.
Kvashnina, Kristina O. (författare)
ESRF European Synchrotron, Rossendorf Beamline, 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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ESRF European Synchrotron, Rossendorf Beamline, 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. Lomonosov Moscow State Univ, Dept Chem, Moscow 119991, Russia. (creator_code:org_t)
2020
2020
Engelska.
Ingår i: Nanoscale. - : ROYAL SOC CHEMISTRY. - 2040-3364 .- 2040-3372. ; 12:35, s. 18039-18048
Relaterad länk:
https://pubs.rsc.org...
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https://urn.kb.se/re...
https://doi.org/10.1...
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  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
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  • The nanoscience field often produces results more mystifying than any other discipline. It has been argued that changes in the plutonium dioxide (PuO2) particle size from bulk to nano can have a drastic effect on PuO2 properties. Here we report a full characterization of PuO2 nanoparticles (NPs) at the atomic level and probe their local and electronic structures by a variety of methods available at the synchrotron, including extended X-ray absorption fine structure (EXAFS) at the Pu L-3 edge, X-ray absorption near edge structure (XANES) in high energy resolution fluorescence detection (HERFD) mode at the Pu L-3 and M-4 edges, high energy X-ray scattering (HEXS) and X-ray diffraction (XRD). The particles were synthesized from precursors with different oxidation states of plutonium (III, IV, and V) under various environmentally and waste storage relevant conditions (pH 8 and pH > 10). Our experimental results analyzed with state-of-the-art theoretical approaches demonstrate that well dispersed, crystalline NPs with a size of similar to 2.5 nm in diameter are always formed in spite of diverse chemical conditions. Identical crystal structures and the presence of only the Pu(IV) oxidation state in all NPs, reported here for the first time, indicate that the structure of PuO2 NPs is very similar to that of the bulk PuO2. All methods give complementary information and show that investigated fundamental properties of PuO2 NPs, rather than being exotic, are very similar to those of the bulk PuO2.

Ämnesord

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

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