Efficient and simultaneous capture of iodine and methyl iodide achieved by a covalent organic framework

Yaqiang Xie, Tingting Pan, Qiong Lei, Cailing Chen, Xinglong Dong, Youyou Yuan, Walid Al Maksoud, Long Zhao, Luigi Cavallo, Ingo Pinnau and Yu Han ()
Additional contact information
Yaqiang Xie: Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST)
Tingting Pan: Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST)
Qiong Lei: Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST)
Cailing Chen: Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST)
Xinglong Dong: Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST)
Youyou Yuan: King Abdullah University of Science and Technology (KAUST)
Walid Al Maksoud: King Abdullah University of Science and Technology (KAUST)
Long Zhao: Huazhong University of Science and Technology
Luigi Cavallo: King Abdullah University of Science and Technology (KAUST)
Ingo Pinnau: Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST)
Yu Han: Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST)

Nature Communications, 2022, vol. 13, issue 1, 1-10

Abstract: Abstract Radioactive molecular iodine (I2) and organic iodides, mainly methyl iodide (CH3I), coexist in the off-gas stream of nuclear power plants at low concentrations, whereas few adsorbents can effectively adsorb low-concentration I2 and CH3I simultaneously. Here we demonstrate that the I2 adsorption can occur on various adsorptive sites and be promoted through intermolecular interactions. The CH3I adsorption capacity is positively correlated with the content of strong binding sites but is unrelated to the textural properties of the adsorbent. These insights allow us to design a covalent organic framework to simultaneously capture I2 and CH3I at low concentrations. The developed material, COF-TAPT, combines high crystallinity, a large surface area, and abundant nucleophilic groups and exhibits a record-high static CH3I adsorption capacity (1.53 g·g−1 at 25 °C). In the dynamic mixed-gas adsorption with 150 ppm of I2 and 50 ppm of CH3I, COF-TAPT presents an excellent total iodine capture capacity (1.51 g·g−1), surpassing various benchmark adsorbents. This work deepens the understanding of I2/CH3I adsorption mechanisms, providing guidance for the development of novel adsorbents for related applications.

Date: 2022
References: Add references at CitEc
Citations: View citations in EconPapers (7)

Downloads: (external link)
https://www.nature.com/articles/s41467-022-30663-3 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-30663-3

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-022-30663-3

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().