Tetrathiafulvalene-based covalent organic frameworks for ultrahigh iodine capture

To safeguard the development of nuclear energy, practical techniques for capture and storage of radioiodine are of critical importance but remain a significant challenge. Here we report the synergistic effect of physical and chemical adsorption of iodine in tetrathiafulvalene-based covalent organic...

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Bibliographic Details
Published in:Chemical science (Cambridge) Vol. 12; no. 24; pp. 8452 - 8457
Main Authors: Chang, Jianhong, Li, Hui, Zhao, Jie, Guan, Xinyu, Li, Cuimei, Yu, Guangtao, Valtchev, Valentin, Yan, Yushan, Qiu, Shilun, Fang, Qianrong
Format: Journal Article
Language:English
Published: England Royal Society of Chemistry 13.05.2021
The Royal Society of Chemistry
Subjects:
Adsorption
Chemical Sciences
Chemisorption
Chemistry
Electron paramagnetic resonance
Functional groups
Infrared spectroscopy
Iodine
Iodine 131
Metal-organic frameworks
Molecular structure
NMR
Nuclear engineering
Nuclear magnetic resonance
Nuclear reactors
Optimization
Photoelectrons
Porous materials
Raman spectroscopy
Silver
Spectrum analysis
Stability analysis
Stability tests
Strong interactions (field theory)
Synergistic effect
Unit cell
ISSN:2041-6520, 2041-6539
Online Access:Get full text
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Summary:To safeguard the development of nuclear energy, practical techniques for capture and storage of radioiodine are of critical importance but remain a significant challenge. Here we report the synergistic effect of physical and chemical adsorption of iodine in tetrathiafulvalene-based covalent organic frameworks (COFs), which can markedly improve both iodine adsorption capacity and adsorption kinetics due to their strong interaction. These functionalized architectures are designed to have high specific surface areas (up to 2359 m 2 g −1 ) for efficient physisorption of iodine, and abundant tetrathiafulvalene functional groups for strong chemisorption of iodine. We demonstrate that these frameworks achieve excellent iodine adsorption capacity (up to 8.19 g g −1 ), which is much higher than those of other materials reported so far, including silver-doped adsorbents, inorganic porous materials, metal-organic frameworks, porous organic frameworks, and other COFs. Furthermore, a combined theoretical and experimental study, including DFT calculations, electron paramagnetic resonance spectroscopy, X-ray photoelectron spectroscopy, and Raman spectroscopy, reveals the strong chemical interaction between iodine and the frameworks of the materials. Our study thus opens an avenue to construct functional COFs for a critical environment-related application. The synergistic effect of physical and chemical adsorption of iodine in tetrathiafulvalene-based covalent organic frameworks (COFs) has been explored. The iodine adsorption capacity of these materials is higher than other materials reported so far.
Bibliography:13
10.1039/d1sc01742j
C NMR spectra, TGA analysis, BET plots, stability test, PXRD patterns and structures, and unit cell parameters. See DOI
Electronic supplementary information (ESI) available: Materials and characterization, optimization of molecular structures, SEM and TEM images, FT-IR spectra, solid-state
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These authors contributed equally.
ISSN:2041-6520
2041-6539
DOI:10.1039/d1sc01742j