Nanofibers of solid-solution thorium(IV)-uranium(IV) oxides by electrospinning

Thorium-uranium dioxide nanofibers were prepared in a three-step process. Green composite microfibers were electrospun from solutions composed of Th(IV) and U(VI) acetylacetonate complexes in different molar ratios, polyvinylpyrrolidone, and acetone/ethanol mixed solvents. The second step converted...

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Published inJournal of nuclear materials Vol. 566; p. 153731
Main Authors Kundrat, Vojtech, Vykoukal, Vit, Moravec, Zdenek, Pinkas, Jiri
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 01.08.2022
Elsevier BV
Subjects
Electrospinning
Ethanol
Fibers
Heat treatment
Heat treatments
Homogeneity
Microfibers
Mixed oxide
Mixed oxides
Nanofibers
Polyvinylpyrrolidone
Solid solutions
Thorium
Uranium
Uranium dioxide
Electrospinning
Polyvinylpyrrolidone
Uranium
Nanofibers
Mixed oxide
Thorium
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Summary:Thorium-uranium dioxide nanofibers were prepared in a three-step process. Green composite microfibers were electrospun from solutions composed of Th(IV) and U(VI) acetylacetonate complexes in different molar ratios, polyvinylpyrrolidone, and acetone/ethanol mixed solvents. The second step converted the green composite fibers by calcination in the air to mixed Th/U oxide fibers. In the final step, the heat treatment under forming gas provided the nanofibers with diameters of 28−46 nm composed of solid solutions ThxU1−xO2 (x = 1, 0.75, 0.5, 0.25, 0). The XRD and STEM-EDS analyses of the prepared Th/U mixed oxide nanofibers attested to their atomic homogeneity.
ISSN:0022-3115
1873-4820
DOI:10.1016/j.jnucmat.2022.153731