Hierarchically porous carbon–zirconium carbide spheres as potentially reusable transmutation targets

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dc.contributor.authorScales, Nen_AU
dc.contributor.authorChen, Jen_AU
dc.contributor.authorHanley, TLen_AU
dc.contributor.authorRiley, DPen_AU
dc.contributor.authorLumpkin, GRen_AU
dc.contributor.authorLuca, Ven_AU
dc.date.accessioned2020-03-24T01:04:06Zen_AU
dc.date.available2020-03-24T01:04:06Zen_AU
dc.date.issued2015-08-01en_AU
dc.description.abstractThe preparation of hierarchically porous phase-pure carbon–zirconium carbide spheres with surface areas upwards of 70 m2/g and diameters in the 1–2 mm range has been achieved. The zirconium carbide beads were prepared through carbothermal reduction of polyacrylonitrile-zirconium composites prepared via three different routes including infiltration of a zirconium precursor into preformed polyacrylonitrile (PAN) beads and two one-pot co-precipitation methods. Depending on the route used to prepare the composites, relatively high surface area phase-pure zirconium carbides with the radial macroporous internal structure of the PAN template could be prepared. The adsorption of the elements U, Mo, Cs and Sr by the zirconium carbide beads was studied as a function of pH in the range 1–13 and target element concentrations of 0.025 mmol/L. The as-prepared hierarchical zirconium carbide beads demonstrated almost quantitative uptake of Mo below pH 4 with uptake decreasing to close to zero and above pH 10.5. On the other hand, U uptake was negligible below pH 4 and became quantitative in the range 4–12. Cesium was not extracted to any significant extent in the pH range studied and Sr only to a limited extent above pH 10. The engineered hierarchical porosities, neutron transparency, thermal stability and anticipated chemical stability of the present zirconium carbide spheres makes them promising candidates as reusable transmutation targets for Minor Actinide incineration. © 2015 Elsevier Inc.en_AU
dc.identifier.citationScales, N., Chen, J., Hanley, T. L., Riley, D. P., Lumpkin, G. R., & Luca, V. (2015). Hierarchically porous carbon–zirconium carbide spheres as potentially reusable transmutation targets. Microporous and Mesoporous Materials, 212, 100-109. doi:10.1016/j.micromeso.2015.03.025en_AU
dc.identifier.govdoc8877en_AU
dc.identifier.issn1387-1811en_AU
dc.identifier.journaltitleMicroporous and Mesoporous Materialsen_AU
dc.identifier.pagination100-109en_AU
dc.identifier.urihttps://doi.org/10.1016/j.micromeso.2015.03.025en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/9212en_AU
dc.identifier.volume212en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectZirconium carbidesen_AU
dc.subjectNitrilesen_AU
dc.subjectTransmutationen_AU
dc.subjectPorosityen_AU
dc.subjectOrganic polymersen_AU
dc.subjectActinidesen_AU
dc.titleHierarchically porous carbon–zirconium carbide spheres as potentially reusable transmutation targetsen_AU
dc.typeJournal Articleen_AU
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