Work

One step synthesis of nitrogen-rich covalent organic frameworks with flexible secondary amine bonds for efficient iodide capture in aqueous solutions

Year: 2024

Type: article

Abstract: 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.

Source: National Science Open

DOI: 10.1360/nso/20240023

Authors: Ziqian Han, Honghan Long, Jie Zhang, Mengyao Wen, Yang Li, Lijian Ma

Institution: Sichuan University

Language: English

Topic: Covalent Organic Framework Applications

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

SDG: Clean water and sanitation

Open Access status: diamond

Funders: National Natural Science Foundation of China, Sichuan University