Pore polarity engineering in hydrogen-bonded organic frameworks for enhanced iodine capture

Segregation of radioiodine species is critical for nuclear safety, and adsorption-based capture has shown great promise for the remediation of pollutants. In this study, a series of isostructural hydrogen-bonded organic frameworks (HOFs) with various polarities were fabricated. The optimal material,...

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Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2022-09, Vol.1 (36), p.1873-18736
Main Authors: Wang, Yeqing, Jin, Yinying, Xian, Weipeng, Zuo, Xiuhui, Wang, Sai, Sun, Qi
Format: Article
Language:English
Subjects:
Adsorption
Aqueous solutions
Hydrogen bonding
Iodine
Iodine 131
Iodine radioisotopes
Moisture effects
Nuclear accidents & safety
Nuclear capture
Nuclear safety
Polarity
Pollutants
Recyclability
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Summary:Segregation of radioiodine species is critical for nuclear safety, and adsorption-based capture has shown great promise for the remediation of pollutants. In this study, a series of isostructural hydrogen-bonded organic frameworks (HOFs) with various polarities were fabricated. The optimal material, HOF-TAM-BPY, exhibited I 2 uptake capacities of 783 wt% and 112 wt% from the air and aqueous solution, respectively, placing it among the top reported systems. HOF-TAM-BPY also exhibited fast adsorption kinetics, full recyclability, and outstanding moisture tolerance. The promoting effect of the pyridine moieties and the unique pore structure of HOFs on the I 2 adsorption was comprehensively elucidated by spectrally identifying the hosted iodine species and calculating the host-guest interactions. These results demonstrate the essential role of the pore environment of the adsorbent in achieving high iodine capture performance. A series of isostructural hydrogen-bonded organic frameworks (HOFs) with various polarities were fabricated and showed high uptake capacity, excellent reversibility, and stability in the adsorption of iodine from the air and aqueous solutions.
ISSN:2050-7488
2050-7496
DOI:10.1039/d2ta05320a