KIT | KIT-Bibliothek | Impressum | Datenschutz

Synthesis and characterization of thorium, uranium and cerium oxide nanoparticles

Batuk, O. N.; Szabo, D. V. ORCID iD icon 1; Denecke, M. A. 2; Vitova, T. ORCID iD icon 2; Kalmykov, S. N.
1 Institut für Meteorologie und Klimaforschung Troposphärenforschung (IMKTRO), Karlsruher Institut für Technologie (KIT)
2 Institut für Nukleare Entsorgung (INE), Karlsruher Institut für Technologie (KIT)


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.

Verlagsausgabe §
DOI: 10.5445/IR/110090749
Veröffentlicht am 18.12.2018
DOI: 10.1524/ract.2012.2014
Zitationen: 13
Web of Science
Zitationen: 12
Zitationen: 15
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Werkstoffprozesstechnik (IAM-WPT)
Institut für Meteorologie und Klimaforschung Troposphärenforschung (IMKTRO)
Institut für Nukleare Entsorgung (INE)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 19.03.2013
Sprache Englisch
Identifikator ISSN: 0033-8230, 2193-3405
KITopen-ID: 110090749
HGF-Programm 43.12.01 (POF II, LK 01) Tailored properties of nanomaterials
Erschienen in Radiochimica acta
Verlag De Gruyter
Band 101
Heft 4
Seiten 233-239
Nachgewiesen in Dimensions
Web of Science
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page