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One step synthesis of nitrogen-rich covalent organic frameworks with flexible secondary amine bonds for efficient iodide capture in aqueous solutions
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One step synthesis of nitrogen-rich covalent organic frameworks with flexible secondary amine bonds for efficient iodide capture in aqueous solutions
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Journal Article
One step synthesis of nitrogen-rich covalent organic frameworks with flexible secondary amine bonds for efficient iodide capture in aqueous solutions
2025
Overview
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.
Publisher
EDP Sciences
Subject
