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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Bibliographic Details
Published in:Journal of nuclear materials 2022-08, Vol.566, p.153731, Article 153731
Main Authors: Kundrat, Vojtech, Vykoukal, Vit, Moravec, Zdenek, Pinkas, Jiri
Format: Article
Language:English
Subjects:
Electrospinning
Ethanol
Fibers
Heat treatment
Heat treatments
Homogeneity
Microfibers
Mixed oxide
Mixed oxides
Nanofibers
Polyvinylpyrrolidone
Solid solutions
Thorium
Uranium
Uranium dioxide
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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