Dissolution of UO2, UO3 and of some lanthanide oxides in BumimTf2N:: effect of acid and water and formation of UO2(NO3)3-

被引：58

作者：

Billard, Isabelle

Gaillard, Clotilde

Hennig, Christoph

机构：

[1] IPH, DRS, F-67037 Strasbourg, France

[2] Forschungszentrum Rossendorf EV, Inst Radiochem, D-01314 Dresden, Germany

来源：

DALTON TRANSACTIONS | 2007年 / 37期

关键词：

D O I：

10.1039/b706355e

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

UO2, UO3, Nd2O3, Eu2O3 and Pr6O11 powders were successfully dissolved in the ionic liquid 1-methyl-3-butyl-imidazolium bistriflimide (BumimTf(2)N) with the help of small amounts of HNO3. The uranyl species have been characterised through UV-vis and EXAFS spectroscopies. The uranium dissolution leads to the formation of UO2(NO3)(3)(-), even in the presence of water. The kinetics of UO2 dissolution/oxidation is intricate, due to the transient existence of NO2-, which is absent in the case of the UO3 dissolution, occurring with no change in the oxidation state of U.

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页码：4214 / 4221

页数：8

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