Back to Search
Start Over
Flexible interdigitated layered framework with multiple accessible active sites for high-performance CH3I capture.
- Source :
- SCIENCE CHINA Chemistry; May2024, Vol. 67 Issue 5, p1569-1577, 9p
- Publication Year :
- 2024
-
Abstract
- The development of adsorbent materials for effective capture of radioactive iodomethane (CH<subscript>3</subscript>I) from the off-gas of used nuclear fuel reprocessing, remains a significant and challenging line of research because currently state-of-art adsorbents still suffer from low binding affinity with CH<subscript>3</subscript>I. Here, we proposed a brand-new adsorption topological structure by developing a 2D interdigitated layered framework, named SCU-20, featuring slide-like channel with multiple active sites for CH<subscript>3</subscript>I capture. The responsive rotating-adaptive aperture of SCU-20 enables the optimal utilization of all active sites within the pore for highly selective recognition and capture of CH<subscript>3</subscript>I. A record-breaking CH<subscript>3</subscript>I uptake capacity of 1.84 g/g was achieved under static sorption conditions with saturated CH<subscript>3</subscript>I vapor. Both experimental and theoretical findings demonstrated that the exceptional uptake of SCU-20 towards CH<subscript>3</subscript>I can be attributed to the confined physical electrostatic adsorption of F sites, coupled with the chemical nitrogen methylation reaction with uncoordinated N atoms of pyrazine. Moreover, dynamic CH<subscript>3</subscript>I uptake capacity potentially allows for the capture of CH<subscript>3</subscript>I in simulated real-world off gas reprocessing conditions. This study highlights the potential of SCU-20 as a promising candidate for efficient capture of iodine species and contributes to the development of effective solutions for radioactive iodine remediation. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 16747291
- Volume :
- 67
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- SCIENCE CHINA Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 177111486
- Full Text :
- https://doi.org/10.1007/s11426-023-1860-5