文献类型：期刊文献

中文题名：超稳定偕胺肟功能化共价有机框架用于高效选择性海水提铀

英文题名：Extremely stable amidoxime functionalized covalent organic frameworks for uranium extraction from seawater with high efficiency and selectivity

作者：程功[1,2];张安睿[1];赵志伟[1];柴子民[1];胡保卫[3];韩冰[1,2];艾玥洁[1];王祥科[1]

机构：[1]North China Elect Power Univ, Coll Environm Sci & Engn, Key Lab Resources & Environm Syst Optimizat, Minist Educ, Beijing 102206, Peoples R China;[2]Anhui Normal Univ, Key Lab Funct Mol Solids, Minist Educ, Wuhu 241000, Peoples R China;[3]Shaoxing Univ, Sch Life Sci, Shaoxing 312000, Peoples R China

年份：2021

卷号：66

期号：19

起止页码：1994

中文期刊名：科学通报：英文版

外文期刊名：Science Bulletin

收录：CSCD2021_2022、Scopus、CSCD、PubMed

基金：This work was supported by the Science Challenge Project (TZ2016004), the National Natural Key Research and Development Program of China (2018YFC1900105 and 2017YFA0207002), and Beijing Outstanding Young Scientist Program.

语种：中文

中文关键词：海水提铀;超稳定;偕胺肟;高选择性;功能化;战略性意义;钒离子;高结晶度;

外文关键词：Amidoxime;Covalent organic frameworks;Extraction;Uranium;High selectivity

中文摘要：海水提铀对于核能生产具有战略性意义.偕胺肟基功能性吸附剂在海水铀提取中发挥着不可或缺的作用.然而,面对海水复杂的离子环境,尤其在钒离子的存在下,同时获得高吸附性能和高选择性是一个巨大挑战.本文制备了基于聚芳醚的开环偕胺肟功能化共价有机框架(COF-HHTF-AO),COF-HHTF-AO表现出高结晶度和优异的化学稳定性.COF-HHTF-AO在真实海水中对铀的提取量高达5.12 mg/g,是钒的1.61倍.理论计算研究发现,铀相比于钒的高选择性归因于其与偕胺肟的结合方式和配位形态.COFHHTF-AO具有高吸附容量、优异的选择性和超高稳定性,是一种具有广泛前景的海水提铀吸附剂.

外文摘要：Uranium extraction from seawater is of strategic significance for nuclear power generation.Amidoximebased functional adsorbents play indispensable roles in the recovery of seawater uranium with high efficiency.Nevertheless,balancing the adsorption capacity and selectivity is challenging in the presence of complicated interfering ions especially vanadium.Herein,a polyarylether-based covalent organic framework functionalized with open-chain amidoxime(COF-HHTF-AO)was synthesized with remarkable chemical stability and excellent crystallinity.Impressively,the adsorption capacity of COF-HHTF-AO towards uranium in natural seawater reached up to 5.12 mg/g,which is 1.61 times higher than that for vanadium.Detailed computational calculations revealed that the higher selectivity for uranium over vanadium originated from the specific bonding nature and coordination pattern with amidoxime.Combining enhanced adsorption capacity,excellent selectivity and ultrahigh stability,COF-HHTF-AO serves as a promising adsorbent for uranium extraction from the natural seawater.