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Synthesis and characterization of thorium, uranium and cerium oxide nanoparticles

Batuk, O.N.; Szabo, D.V.; Denecke, M.A.; Vitova, T.; Kalmykov, S.N.

Abstract:
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 decr ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/110090749
Veröffentlicht am 18.12.2018
Originalveröffentlichung
DOI: 10.1524/ract.2012.2014
Scopus
Zitationen: 5
Web of Science
Zitationen: 4
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Werkstoffprozesstechnik (IAM-WPT)
Publikationstyp Zeitschriftenaufsatz
Jahr 2013
Sprache Englisch
Identifikator ISSN: 0033-8230, 2193-3405
urn:nbn:de:swb:90-AAA1100907493
KITopen-ID: 110090749
HGF-Programm 43.12.01 (POF II, LK 01)
Erschienen in Radiochimica acta
Band 101
Seiten 233-239
Nachgewiesen in Scopus
Web of Science
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