文献类型：期刊文献

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

作者：Cheng, Gong[1,2];Zhang, Anrui[1];Zhao, Zhiwei[1];Chai, Zimin[1];Hu, Baowei[3];Han, Bing[1,2];Ai, Yuejie[1];Wang, Xiangke[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

外文期刊名：SCIENCE BULLETIN

收录：SCI-EXPANDED(收录号：WOS:000697022500012)、、EI(收录号：20212210445253)、Scopus(收录号：2-s2.0-85106962113)、WOS

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：英文

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

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. (c) 2021 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved.