Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 312, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.micromeso.2020.110739
Keywords
Nitrogen-containing covalent organic framework; Iodine capture; Mixed adsorption; Charge-transfer interactions
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Funding
- School of Materials Science and Engineering at Wuhan University of Technology
- innovation project of Wuhan Textile University
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This study explored the crystallization of a stable nitrogen-containing COF for efficient and reversible volatile iodine capture, demonstrating high uptake capacity and recyclability.
The use of covalent organic frameworks (COFs) to cope with environmental issues was promising but making them commercial and practical remains a challenge. In this work, we explored the crystallization of a stable nitrogen-containing covalent organic framework (TAPA-PDA COF) and used it as a porous platform for efficient and reversible volatile iodine capture. The TAPA-PDA COF, prepared by simple, rapid, low temperature reactions, possesses a high BET surface area of over 685 m(2)/g, good crystallinity, high thermal stability and ultrahigh capture of iodine vapor up to 5.09 g/g, which was significantly higher than most reported iodine adsorbents. Although the Raman spectroscopy confirmed the formation of polyiodide compounds through charge transfer between sorbents and iodine molecules, the TAPA-PDA COF still has the ability to be recycled five times while maintaining a high uptake capacity. This study provides promising strategy to solve the difficult problems of commercializing COFs and utilizing them for practical application.
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