Spontaneous Deposition of Uranium Oxide at the Interface between Room Temperature Inorganic Ionic Liquid and Organic Solution
| Project/Area Number |
25420905
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Nuclear engineering
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 電解還元 / ウラン / 水和物溶融体 / 析出 / XAFS / 液液界面 / 乾式再処理 / ナノ粒子 / 再処理 |
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| Outline of Final Research Achievements |
The redox reaction of UO22+ in calcium chloride hexahydrate, CaCl2/6H2O, was investigated by electrochemical and spectroscopic methods. The hexavalent uranium UO22+ was dissolved and stabilized without hydrolysis in CaCl2/6H2O. Two step cathodic currents were observed corresponding to the reduction of UO22+. The reversible redox reaction of the UO22+/UO2+ couple was observed at the first cathodic current. The second cathodic reaction corresponding to the reduction of UO2+ was irreversible. The deposit formed at a bulk and a surface area of the platinum working electrode was determined to be uranium dioxide UO2 by X-ray diffraction analysis. The UO2+ was formed for very short lifetime at the first cathodic current resulting into UO2 formation because of UO2+ disproportionation reaction as the following reaction; 2UO2+ → UO22+ + UO2. The electron transfer reaction was observed at the interface between aqueous phase containing UO22+ and organic phase containing a reductant.
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Report
(4 results)
Research Products
(29 results)
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[Presentation] In Situ XAS Studies of Pd Nanoparticle Nucleation at an Interface of Two Immiscible Phases2015
Author(s)
S.-Y. Chang, S.G. Booth, Y. Grunder, L.B. Molleta, A. Uehara, J.F.W. Mosselmans, G. Cibin, R.A.W. Dryfe, S.L.M. Schroeder
Organizer
XAFS16, 16th International Conference on X-ray Absorption Fine Structure
Place of Presentation
Karlsruhe, Germany
Year and Date
2015-08-23
Related Report
Int'l Joint Research
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[Presentation] Brust-Schiffrin Synthesis: A mechanistic study2015
Author(s)
S. G. Booth, A. Uehara, S.-Y. Chang, J. F. W. Mosslemans, S. L. M. Schroeder and R. A. W. Dryfe
Organizer
XAFS16, 16th International Conference on X-ray Absorption Fine Structure
Place of Presentation
Karlsruhe, Germany
Year and Date
2015-08-23
Related Report
Int'l Joint Research
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[Presentation] 金ナノ粒子生成過程の電荷移動ボルタンメトリーによる解析2014
Author(s)
上原章寛, S.G. Booth, S.Y. Chang, S.L.M. Schroeder, J.F.W. Mosselmans, R.A.W. Dryfe
Organizer
ポーラログラフ及び電気分析化学討論会
Place of Presentation
京都工芸繊維大学
Year and Date
2014-11-15 – 2014-11-16
Related Report
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