铀(VI)和磷酸三丁酯配合物在离子液体中的电化学行为研究  

Electrochemistry Behavior Research of Uranium and TBP's Coordination Compoundin Ionic Liquids

作　　者：邱凌云[1] 刘良军[1] 

机构地区：[1]南华大学核科学技术学院,湖南衡阳421001

出　　处：《南华大学学报（自然科学版）》2014年第2期99-102,共4页Journal of University of South China：Science and Technology

摘　　要：选择磷酸三丁酯(TBP)作为配体,考察铀酰—TBP配合物在1-丁基-3-甲基咪唑双三氟甲基磺酰亚胺盐([Bmim][NTf2])离子液体的萃取及电化学行为.发现铀(VI)经过两步单电子还原为铀(IV),且铀(V)至铀(IV)的还原电位(-2.7 V Vs.Pt)超过此体系的电化学窗口,电沉积物为U3(PO3)4,继续热处理电沉积产物约573 K时转化为UP2O7.此研究表明离子液体可能在乏燃料金属的电化学分离中表现出乐观的前景.Herein,TBP is selected as a ligand to investigate the extraction and electrochemical behavior,which is coordination compound of uranyl-TBP and [Bmim][NTf2]system in our work. It is found that hexavalent uranium transforms into tetravalent uranium by two steps of single electron reduction. And the reduction potential,pentavelent uranium to tetravalent uranium,exceeds the system＇s electrochemical window. The electrodeposition is U3（ PO3）4,then turns to UP2O7by heating at about 573 K. It indicates that ionic liquids may show bright prospect in electrochemical separation of spent nuclear fuel reprocessing.

关 键 词：铀 离子液体 萃取 电化学还原 

分 类 号：TU212[建筑科学—建筑设计及理论]