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Radiochimica Acta

International Journal for chemical aspects of nuclear science and technology

Editor-in-Chief: Qaim, Syed M.

12 Issues per year

IMPACT FACTOR 2016: 1.271
5-year IMPACT FACTOR: 1.286

CiteScore 2016: 1.20

SCImago Journal Rank (SJR) 2016: 0.486
Source Normalized Impact per Paper (SNIP) 2016: 0.761

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Volume 101, Issue 4


Synthesis and characterization of thorium, uranium and cerium oxide nanoparticles

Olga N. Batuk / D. Vinga Szabó / Melissa A. Denecke
  • Karlsruhe Institute of Technology (KIT), Institut für Nukleare Entsorgung, Karlsruhe, Deutschland
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/ Tonya Vitova / Stepan N. Kalmykov
Published Online: 2013-03-19 | DOI: https://doi.org/10.1524/ract.2012.2014


We describe the synthesis of cerium, thorium and uranium oxide nanoparticles embedded in a mesoporous matrix as template in a kind of nanocasting technique. The solid matrix is used as a template to obtain and stabilize the actinide oxide nanoparticles. We apply high resolution transmission electron microscopy (HR-TEM) to show evidence of metal oxide incorporation into the matrix pores and analyze their structure. Measured interplanar distances and calculated lattice parameters for synthesized nanosized CeO2−x and ThO2 samples differ from their bulk crystalline counterparts. We obtain with our synthesis CeO2−x particles containing both Ce4+ and larger sized Ce3+. The lattice parameter for these ceria nanoparticles is found to be larger than the bulk value due to the presence of Ce3+ with its larger ionic radius. The presence of Ce3+ was established by means of high resolution X-ray emission spectroscopy (HRXES), applied to the investigation of nanoparticles for the first time. The ThO2 nanoparticles exhibit a decrease in interplanar distances, as one might generally expected for these nanoclusters. However, the lattice distance decrease for our particles is remarkable, up to 5%, indicating that contact with the surrounding silica matrix may exert a bond distance shortening effect such as through significant external pressure on the particle surface.

Keywords: Actinide oxides; Nanoparticle; Mesoporous silica; Ultrasound

About the article

* Correspondence address: Lomonosov Moscow State University, Chemistry Department, Moscow, Russische Föderation

Published Online: 2013-03-19

Published in Print: 2013-04-01

Citation Information: Radiochimica Acta International journal for chemical aspects of nuclear science and technology, Volume 101, Issue 4, Pages 233–240, ISSN (Print) 2193-3405 , DOI: https://doi.org/10.1524/ract.2012.2014.

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