2023
DOI: 10.1002/smll.202301001
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Direct Separation of UO22+ by Coordination Sieve Effect via Spherical Coordination Traps

Abstract: nuclear energy. [1][2] Generally, selective adsorption of UO 2 2+ was viewed to be one of the best effective methods to achieve UO 2 2+ separation, due to the complicated environment in both spent fuel or seawater that contains a large number of other metal ions except for UO 2 2+ ion. [3] Accordingly, there have paid a long-term and big effort to enhance the selectivity of uranyl over other metal ions (S U/M ) selectivity by designing various adsorption sites via tuning their affinity towards UO 2 2+ such as … Show more

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Cited by 5 publications
(2 citation statements)
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“…S8†), suggesting the adsorption of uranyl ions. 28–38 The binding energy of the P element in the uranium-loaded samples shifts to a higher energy (Fig. S9†), relative to that of ECUT-POP-3P, most likely due to the coordination interaction between uranyl ions and the loaded phosphoric acid units.…”
Section: Resultsmentioning
confidence: 99%
“…S8†), suggesting the adsorption of uranyl ions. 28–38 The binding energy of the P element in the uranium-loaded samples shifts to a higher energy (Fig. S9†), relative to that of ECUT-POP-3P, most likely due to the coordination interaction between uranyl ions and the loaded phosphoric acid units.…”
Section: Resultsmentioning
confidence: 99%
“…Traditional adsorbents, such as zeolites, clay, mesoporous carbon, and metals oxides, often suffer from slow adsorption kinetics, low adsorption selectivity, and capacities, which stems from their simple composition and lack of structural and functional tunability. , To achieve better adsorption performance for uranium, adsorbents with structural and functional tunability are highly desired, and adsorbent design with multiple factors should be considered, including surface area, porosity, and amount of adsorption sites. Bearing this in mind, metal–organic frameworks (MOFs), a kind of crystalline hybrid porous material with a large surface area, densely populated chelating groups, and tunable pore structures, have been developed . The precisely designable and tailorable structures and components in MOFs are convenient to realize high performance in uranium extraction. Amidoxime groups can be purposefully incorporated into UiO-66-NH-(AO) by a postsynthetic strategy, which showed good selectivity for uranium even in the presence of high concentrations of VO 2 2+ , Fe 3+ , Mg 2+ , Ca 2+ , and Zr 4+ . By introducing carboxyl and amidoxime groups into the MOF of MIL-101-SMA-AO, the elaborately constructed MOF exhibited ultrahigh uptake capacity (1086 mg/g) for uranium.…”
Section: Introductionmentioning
confidence: 99%