4.6 Article

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

Journal

SCIENCE BULLETIN
Volume 66, Issue 19, Pages 1994-2001

Publisher

ELSEVIER
DOI: 10.1016/j.scib.2021.05.012

Keywords

Amidoxime; Covalent organic frameworks; Extraction; Uranium; High selectivity

Funding

  1. Science Challenge Project [TZ2016004]
  2. National Natural Key Research and Development Program of China [2018YFC1900105, 2017YFA0207002]
  3. Beijing Outstanding Young Scientist Program

Ask authors/readers for more resources

A polyarylether-based covalent organic framework functionalized with open-chain amidoxime was synthesized for efficient uranium extraction from seawater. The adsorbent demonstrated high selectivity for uranium over vanadium, with significantly enhanced adsorption capacity, and high stability, making it a promising material for uranium extraction from natural seawater.
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.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.6
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available