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Radiochimica Acta

International Journal for chemical aspects of nuclear science and technology

Editor-in-Chief: Qaim, Syed M.

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Volume 104, Issue 12

Issues

Photoreduction of Pu(V,VI) by TiO2

Anna Yu. Romanchuk
  • Lomonosov Moscow State University, Department of Chemistry, 119991, Moscow, Russian Federation
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/ Stepan N. Kalmykov
  • Corresponding author
  • Lomonosov Moscow State University, Department of Chemistry, 119991, Moscow, Russian Federation
  • Vernadsky Institute of Geochemistry and Analytical Chemistry of RAS, 119991, Moscow, Russian Federation
  • National Research Centre “Kurchatov Institute,” 123182, Moscow, Russian Federation
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/ Alexander V. Egorov
  • Lomonosov Moscow State University, Department of Chemistry, 119991, Moscow, Russian Federation
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/ Yan V. Zubavichus / Andrei A. Shiryaev
  • Lomonosov Moscow State University, Department of Chemistry, 119991, Moscow, Russian Federation
  • Frumkin Institute of Physical Chemistry and Electrochemistry of RAS, 119071, Moscow, Russian Federation
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/ Eugene A. Smirnov
  • Lomonosov Moscow State University, Department of Chemistry, 119991, Moscow, Russian Federation
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/ Alexey V. Garshev
  • Lomonosov Moscow State University, Department of Chemistry, 119991, Moscow, Russian Federation
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Published Online: 2016-08-25 | DOI: https://doi.org/10.1515/ract-2015-2494

Abstract

In this study, the effect of light on the kinetics and speciation of plutonium at its interaction with particles of TiO2 under different light conditions is shown for the first time. It was found that sorption was followed by reduction of the plutonium to Pu(IV). In this, the reduction reaction and sorption in conditions of the presence of light proceed significantly more rapidly due to the photocatalytic activity of titanium dioxide, providing a source of electrons for the reaction. Spectral methods (XAFS and TEM) showed that plutonium forms nanoclusters with the structure of PuO2, which decorate the surface of the solid phase.

This article offers supplementary material which is provided at the end of the article.

Keywords: Plutonium; sorption; redox reactions; photocatalysis; titania

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About the article

Received: 2015-08-02

Accepted: 2016-06-25

Published Online: 2016-08-25

Published in Print: 2016-12-01


Funding Source: Russian Science Foundation

Award identifier / Grant number: 14-13-01279

This work was supported by the Russian Science Foundation (project 14-13-01279). We also acknowledge the “Nanochemistry and nanomaterials” user facility of the Department of Chemistry of MSU for providing the HRTEM measurements.


Citation Information: Radiochimica Acta, Volume 104, Issue 12, Pages 843–851, ISSN (Online) 2193-3405, ISSN (Print) 0033-8230, DOI: https://doi.org/10.1515/ract-2015-2494.

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