Julien Patrick A, Castle Grace, Theriault Jordan, Kohlgruber Tsuyoshi A, Oliver Allen G, Burns Peter C
Department of Civil & Environmental Engineering & Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States.
Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States.
Inorg Chem. 2022 Jul 25;61(29):11319-11324. doi: 10.1021/acs.inorgchem.2c01445. Epub 2022 Jul 13.
Mechanochemistry enables transformations of highly insoluble materials such as uranium dioxide or the mineral studtite [(UO)(O)(HO)]·(HO) into uranyl triperoxide compounds that can subsequently assemble into hydroxide-bridged uranyl peroxide dimers in the presence of lithium hydroxide. Dissolution of these solids in water yields uranyl peroxide nanoclusters including U, Li[(UO)(O)(OH)]. Insoluble uranium solids can transform into highly soluble uranyl peroxide phases in the solid state with miniscule quantities of water. Such reactions are potentially applicable to uranium processing in the front and back end of the nuclear fuel cycle.
机械化学能够将高度不溶性材料（如二氧化铀或水铀矿[(UO₂)(O₂)(H₂O)]·(H₂O)₂）转化为过氧化铀酰化合物，随后在氢氧化锂存在下，这些化合物可组装成氢氧化物桥连的过氧化铀酰二聚体。这些固体在水中溶解会产生包括U₄Li₂[(UO₂)₂(O₂)₃(OH)₂]在内的过氧化铀酰纳米团簇。不溶性铀固体在极少量水的存在下能够在固态下转化为高可溶性的过氧化铀酰相。此类反应在核燃料循环的前端和后端铀处理中具有潜在应用价值。
