DC Field | Value | Language |
---|---|---|
dc.contributor.author | Khan, Mumtaz | - |
dc.contributor.author | Um, Wooyong | - |
dc.contributor.author | Kim, Won-Seok | - |
dc.contributor.author | Heo, Jong | - |
dc.contributor.author | Kim, HyunJu | - |
dc.contributor.author | Chang, Seeun | - |
dc.date.accessioned | 2019-04-07T17:51:00Z | - |
dc.date.available | 2019-04-07T17:51:00Z | - |
dc.date.created | 2018-06-22 | - |
dc.date.issued | 2018-07 | - |
dc.identifier.issn | 0022-3115 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/95850 | - |
dc.description.abstract | As an analog of technetium (Tc-99), rhenium (Re) was incorporated into the tin oxide (SnO2) lattice structure to produce a stable phase. This new bi-metallic oxide consisting of Re4+ and Sn4+ was formed from perrhenate (ReO4-) reduction by tin (Sn2+) and could reduce re-oxidation. After the precipitate was characterized by various techniques, the precipitate morphology and XRD patterns were found to resemble those of cassiterite (SnO2) with narrow crystallite size (D-average = similar to 1.47 nm). The local structure of the precipitate was characterized as Re-O (similar to 2.02 nm), Re-Sn (similar to 3.15 nm), and Re-Sn (similar to 3.70 nm) in the first, second, and third coordination shells, respectively. As Re4+ was doped into the cassiterite phase, the precipitate was much less soluble than alpha-ReO2 (dissolved Re = similar to 0.10 mg L-1 vs. similar to 45.20 mg L-1). The precipitate resisted re-oxidation, and the dissolved Re species were re-precipitated after 23 h. A major portion of Re dissolved during the solubility and re-oxidation tests was assigned to the species of Re+1 (12%), Re2+ (47.42%), Re4+ (28.48%), and Re7+ (12.18%) on the surface of precipitate, while Re+1 (1.05%), Re2+ (15.35%), Re5+ (27.77%), and Re7+ (55.82%) species were found on the alpha-ReO2 surface. These findings suggest that low-temperature reductive co-precipitation can incorporate Tc-99 (or Re) into the SnO2 structure which limit the Tc-99 (or Re) re-oxidation and solubility. (C) 2018 Elsevier B.V. All rights reserved. | - |
dc.language | English | - |
dc.publisher | ELSEVIER SCIENCE BV | - |
dc.relation.isPartOf | JOURNAL OF NUCLEAR MATERIALS | - |
dc.title | Synthesis of rhenium-doped tin dioxide for technetium radioactive waste immobilization | - |
dc.type | Article | - |
dc.identifier.doi | 10.1016/j.jnucmat.2018.04.014 | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | JOURNAL OF NUCLEAR MATERIALS, v.505, pp.134 - 142 | - |
dc.identifier.wosid | 000432845800016 | - |
dc.citation.endPage | 142 | - |
dc.citation.startPage | 134 | - |
dc.citation.title | JOURNAL OF NUCLEAR MATERIALS | - |
dc.citation.volume | 505 | - |
dc.contributor.affiliatedAuthor | Khan, Mumtaz | - |
dc.contributor.affiliatedAuthor | Um, Wooyong | - |
dc.contributor.affiliatedAuthor | Heo, Jong | - |
dc.contributor.affiliatedAuthor | Kim, HyunJu | - |
dc.contributor.affiliatedAuthor | Chang, Seeun | - |
dc.identifier.scopusid | 2-s2.0-85045584413 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | N | - |
dc.type.docType | Article | - |
dc.subject.keywordPlus | RAY-ABSORPTION SPECTROSCOPY | - |
dc.subject.keywordPlus | MONOCLINIC REO2 | - |
dc.subject.keywordPlus | PERTECHNETATE | - |
dc.subject.keywordPlus | REDUCTION | - |
dc.subject.keywordPlus | FE(II) | - |
dc.subject.keywordPlus | EXAFS | - |
dc.subject.keywordPlus | ANTIMONY | - |
dc.subject.keywordPlus | TC(VII) | - |
dc.subject.keywordPlus | IRON | - |
dc.subject.keywordPlus | SNO2 | - |
dc.subject.keywordAuthor | Technetium | - |
dc.subject.keywordAuthor | Rhenium | - |
dc.subject.keywordAuthor | Reduction | - |
dc.subject.keywordAuthor | Incorporation | - |
dc.subject.keywordAuthor | Recalcitrant | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Nuclear Science & Technology | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalResearchArea | Nuclear Science & Technology | - |
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