| Issue |
Natl Sci Open
Volume 4, Number 1, 2025
Special Topic: Nuclear Environment Advances
|
|
|---|---|---|
| Article Number | 20240023 | |
| Number of page(s) | 13 | |
| Section | Earth and Environmental Sciences | |
| DOI | https://doi.org/10.1360/nso/20240023 | |
| Published online | 19 September 2024 | |
RESEARCH ARTICLE
One step synthesis of nitrogen-rich covalent organic frameworks with flexible secondary amine bonds for efficient iodide capture in aqueous solutions
College of Chemistry, Sichuan University, Chengdu 610064, China
* Corresponding authors (emails: liyangcd@scu.edu.cn (Yang Li); ma.lj@hotmail.com (Lijian Ma))
Received:
31
May
2024
Revised:
26
July
2024
Accepted:
15
August
2024
As the radioactive iodine possessed volatility and diffusibility, it needed to be properly disposed in order to prevent environmental and health risks. Recently, nitrogen-rich covalent organic frameworks (COFs) were found to have high iodine adsorption capacity, but the unstable linkages limited their application. In this work, we synthesized an amine-linked COFs with nitrogen-rich melamine unit named TABN-COF. TABN-COF exhibited a strong affinity for iodine, with an adsorption capacity of up to 365 mg/g for I3− in aqueous phase. The ultra-strong stability of TABN-COF enabled it to maintain its crystallinity structure even after treatment with acids, bases, simulated seawater, reducing agents, and oxidizing agents, without compromising the removal rate of I3−. These characteristics made TABN-COF promising for the adsorption of I3− in complex marine systems.
Key words: covalent organic frameworks / melamine / amine-linked / iodine adsorption / marine system
© The Author(s) 2024. Published by Science Press and EDP Sciences.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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