Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 10, Pages 4168-4175Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201916360
Keywords
covalent organic frameworks; nuclear energy; redox adsorption; sorption; uranium
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Funding
- Science Challenge Project [TZ2016004]
- National Natural Science Foundation of China [21771128, 21976125, 21671140]
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We report the first example of 2D covalent organic framework nanosheets (Redox-COF1) for the selective reduction and in situ loading of valence-variable, redox-sensitive and long-lived radionuclides (abbreviated as VRL nuclides). Compared with sorbents based on chemical adsorption and physical adsorption, the redox adsorption mechanism of Redox-COF1 can effectively reduce the impact of functional group protonation under the usual high-acidity conditions in chemisorption, and raise the adsorption efficiency from the monotonous capture by pores in physisorption. The adsorption selectivity for UO22+ reaches up to unprecedented ca. 97 % at pH 3, more than for any analogous adsorbing material.
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