Dissolution of $UO_2$, $UO_3$ and of some lanthanide oxides in Bumim $Tf_2$N: effect of acid and water and formation of $UO_2(NO_3)_3^–$ - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Dalton Transactions Year : 2007

Dissolution of $UO_2$, $UO_3$ and of some lanthanide oxides in Bumim $Tf_2$N: effect of acid and water and formation of $UO_2(NO_3)_3^–$

C. Gaillard
C. Hennig
  • Function : Author

Abstract

UO_2, UO_3, Nd_2O_3, Eu_2O_3 and Pr_6O_11 powders were successfully dissolved in the ionic liquid 1-methyl-3-butyl-imidazolium bistriflimide (BumimTf_2N) with the help of small amounts of HNO_3. The uranyl species have been characterised through UV-vis and EXAFS spectroscopies. The uranium dissolution leads to the formation of UO_2(NO_3)_3^–, even in the presence of water. The kinetics of UO_2 dissolution/oxidation is intricate, due to the transient existence of NO_2^–, which is absent in the case of the UO_3 dissolution, occurring with no change in the oxidation state of U.

Domains

Radiochemistry

Dates and versions

in2p3-00180956 , version 1 (22-10-2007)

Identifiers

Cite

I. Billard, C. Gaillard, C. Hennig. Dissolution of $UO_2$, $UO_3$ and of some lanthanide oxides in Bumim $Tf_2$N: effect of acid and water and formation of $UO_2(NO_3)_3^–$. Dalton Transactions, 2007, pp.4214-4221. ⟨10.1039/b706355e⟩. ⟨in2p3-00180956⟩
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