Self-Adjusting Metal-Organic Framework for Efficient Capture of Trace Xenon and Krypton.

Autor: Niu Z; College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P.R. China., Fan Z; College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P.R. China., Pham T; Department of Chemistry, University of South Florida, 4202 E. Fowler Avenue, Tampa, FL 33620, USA., Verma G; Department of Chemistry, University of North Texas, Denton, TX 76201, USA., Forrest KA; Department of Chemistry, University of South Florida, 4202 E. Fowler Avenue, Tampa, FL 33620, USA., Space B; Department of Chemistry, North Carolina State University, 2700 Stinson Dr., Raleigh, NC 27607, USA., Thallapally PK; Physical and Computational Science Directorate, Pacific Northwest National Laboratory, Richland, WA 99354, USA., Al-Enizi AM; Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia., Ma S; Department of Chemistry, University of North Texas, Denton, TX 76201, USA.
Jazyk: angličtina
Zdroj: Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2022 Mar 07; Vol. 61 (11), pp. e202117807. Date of Electronic Publication: 2022 Jan 27.
DOI: 10.1002/anie.202117807
Abstrakt: The capture of the xenon and krypton from nuclear reprocessing off-gas is essential to the treatment of radioactive waste. Although various porous materials have been employed to capture Xe and Kr, the development of high-performance adsorbents capable of trapping Xe/Kr at very low partial pressure as in the nuclear reprocessing off-gas conditions remains challenging. Herein, we report a self-adjusting metal-organic framework based on multiple weak binding interactions to capture trace Xe and Kr from the nuclear reprocessing off-gas. The self-adjusting behavior of ATC-Cu and its mechanism have been visualized by the in-situ single-crystal X-ray diffraction studies and theoretical calculations. The self-adjusting behavior endows ATC-Cu unprecedented uptake capacities of 2.65 and 0.52 mmol g -1 for Xe and Kr respectively at 0.1 bar and 298 K, as well as the record Xe capture capability from the nuclear reprocessing off-gas. Our work not only provides a benchmark Xe adsorbent but proposes a new route to construct smart materials for efficient separations.
(© 2022 Wiley-VCH GmbH.)
Databáze: MEDLINE
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