利用金属-有机笼子选择性吸附铀酰和二价锶离子  

Employing metal-organic cage for selective capture of UO_(2)^(2+)and Sr^(2+)

作　　者：郭裂成 张辉平 夏永明 龚乐乐 张利鹏 罗峰 Liecheng Guo;Huiping Zhang;Yongming Xia;Lele Gong;Lipeng Zhang;Feng Luo(School of Chemistry,Biology and Materials Science,East China University of Technology,Nanchang 330013,China;State Key Laboratory of Organic-Inorganic Composites,Beijing Advanced Innovation Center for Soft Matter Science and Engineering,College of Chemical Engineering,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]School of Chemistry,Biology and Materials Science,East China University of Technology,Nanchang 330013,China [2]State Key Laboratory of Organic-Inorganic Composites,Beijing Advanced Innovation Center for Soft Matter Science and Engineering,College of Chemical Engineering,Beijing University of Chemical Technology,Beijing 100029,China

出　　处：《Science China Materials》2023年第8期3285-3291,共7页中国科学（材料科学（英文版）

基　　金：supported by the Training Program for Academic and Technical Leaders of Major Disciplines in Jiangxi Province(20194BCJ22010);the National Natural Science Foundations of China(21966002);the Youth Leading Talent Project of Fuzhou(2020ED64);Jiangxi Project(DHSQT22021007).

摘　　要：铀酰与二价锶离子的选择性捕获是核燃料后处理、核事故预防和环境保护的关键组成部分.我们在此报道了一个概念验证,通过使用C_(3)对称的多羧酸配体(H_(3)L)将铀酰离子固定在一起,使用金属有机笼(MOC)选择性捕获铀酰与二价锶离子.通过这种金属有机笼方法,我们可以通过使用H_(3)L配体作为萃取剂,从多种金属混合溶液中高效提取铀酰离子,萃取效率高达97%,且铀酰选择性高达19.4–97,展示了MOC在铀酰捕获中的应用.此外,MOC也可用作固相吸附剂,并通过形成一种SrO4N2八面体来选择性捕获二价锶离子.Selective capture of UO_(2)^(2+)and Sr^(2+)ions represents a key component in the nuclear fuel reprocessing,nuclear accident prevention,and environmental protection.We report herein a proof of concept,employing metal-organic cage(MOC)for the selective capture of UO_(2)^(2+)or Sr^(2+)ions,through using a C_(3)-symmetrical multiple-carboxylate ligand(H_(3)L)to fix uranyl ions together.By means of such MOC approach,we can facilitate the extraction of uranyl ions from a multiple metallic mixed solution by using the H_(3)L ligands as an extractant,showing an ultrahigh extraction efficiency of 97%and UO_(2)^(2+)selectivity of 19.4–97,suggesting its superior application in the UO_(2)^(2+)capture.The mechanism for such outstanding performance is due to the formation of a polyoxouranyl-based MOC.Moreover,this MOC compound can be also used as a solid adsorbent to selectively capture Sr^(2+)ions through a unique mechanism with the formation of a SrO_(4)N_(2)octahedral coordination.

关 键 词：铀酰离子 二价 选择性吸附 羧酸配体 核燃料后处理 锶离子 萃取效率 环境保护 

分 类 号：X771[环境科学与工程—环境工程] TQ424[化学工程]