Journal article
Nanotrap grafted anionic MOF for superior uranium extraction from seawater
- Abstract:
- On-demand uranium extraction from seawater (UES) can mitigate growing sustainable energy needs, while high salinity and low concentration hinder its recovery. A novel anionic metal-organic framework (iMOF-1A) is demonstrated adorned with rare Lewis basic pyrazinic sites as uranyl-specific nanotrap serving as robust ion exchange material for selective uranium extraction, rendering its intrinsic ionic characteristics to minimize leaching. Ionic adsorbents sequestrate 99.8% of the uranium in 120 mins (from 20,000 ppb to 24 ppb) and adsorb large amounts of 1336.8 mg g−1 and 625.6 mg g−1 from uranium-spiked deionized water and artificial seawater, respectively, with high distribution coefficient, KdU ≥ 0.97 × 106 mL g−1. The material offers a very high enrichment index of ≈5754 and it achieves the UES standard of 6.0 mg g−1 in 16 days, and harvests 9.42 mg g−1 in 30 days from natural seawater. Isothermal titration calorimetry (ITC) studies quantify thermodynamic parameters, previously uncharted in uranium sorption experiments. Infrared nearfield nanospectroscopy (nano-FTIR) and tip-force microscopy (TFM) enable chemical and mechanical elucidation of host-guest interaction at atomic level in sub-micron crystals revealing extant capture events throughout the crystal rather than surface solely. Comprehensive experimentally guided computational studies reveal ultrahigh-selectivity for uranium from seawater, marking mechanistic insight.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
-
-
(Preview, Accepted manuscript, pdf, 3.1MB, Terms of use)
-
- Publisher copy:
- 10.1002/smll.202302014
Authors
+ Engineering and Physical Sciences Research Council
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- Funder identifier:
- https://ror.org/0439y7842
- Grant:
- EP/R511742/1
- Publisher:
- Wiley
- Journal:
- Small More from this journal
- Volume:
- 20
- Issue:
- 3
- Article number:
- 2302014
- Place of publication:
- Germany
- Publication date:
- 2023-09-12
- Acceptance date:
- 2023-08-08
- DOI:
- EISSN:
-
1613-6829
- ISSN:
-
1613-6810
- Pmid:
-
37698252
- Language:
-
English
- Keywords:
- Pubs id:
-
1525736
- Local pid:
-
pubs:1525736
- Deposit date:
-
2023-09-21
- ARK identifier:
Terms of use
- Copyright holder:
- Wiley-VCH GmbH
- Copyright date:
- 2023
- Rights statement:
- © 2023 Wiley-VCH GmbH
- Notes:
- This is the accepted manuscript version of the article. The final version is available online from Wiley at https://dx.doi.org/10.1002/smll.202302014
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