Ion sieving in graphene oxide membrane enables efficient actinides/lanthanides separation

Wang, Zhipeng; Huang, Liqin; Dong, Xue; Wu, Tong; Qi, Qing; Chen, Jing; Lu, Yuexiang; Xu, Chao

doi:10.1038/s41467-023-35942-1

Cited by 42 publications

(19 citation statements)

References 50 publications

(81 reference statements)

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“…Indeed, works have demonstrated impressive ion separations using GO membranes. 110,111 Another work demonstrated three-dimensional GO structures with impressive ion sorptions. 112 However, little information has been provided about the exact interactions between the GO flakes, adsorbed ions, flowing liquid water, and interlayer supports.…”

Section: Ion Adsorption and Water Behaviour In Three-dimensional Grap...mentioning

confidence: 99%

Ion and water adsorption to graphene and graphene oxide surfaces

2023

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Section: Ion Adsorption and Water Behaviour In Three-dimensional Grap...mentioning

confidence: 99%

Ion and water adsorption to graphene and graphene oxide surfaces

2023

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“…The prepared G/Z/M membrane was used to separate the Li + , Na + , K + , and Mg 2+ ion mixture solution, and the samples were analyzed by inductively coupled plasma optical emission spectroscopy (ICP-OES) for the concentration of each ion and the permeation percentages (Pct) was calculated using the following equation Pct = C t C 0 where C t is the measured concentration of the metal ion in ppm and C 0 is the concentration of the starting ion of the permeate.…”

Section: Materials and Methodsmentioning

confidence: 99%

Ternary Heterostructure Membranes with Two-Dimensional Tunable Channels for Highly Selective Ion Separation

Liu,

Zhang,

et al. 2023

JACS Au

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Selective ion separation from brines is pivotal for attaining high-purity lithium, a critical nonrenewable resource. Conventional methods encounter substantial challenges, driving the quest for streamlined, efficient, and swift approaches. Here, we present a graphene oxide (GO)-based ternary heterostructure membrane with a unique design. By utilizing Zn2+-induced confinement synthesis in a two-dimensional (2D) space, we incorporated two-dimensional zeolitic imidazolate framework-8 (ZIF-8) and zinc alginate (ZA) polymers precisely within layers of the GO membrane, creating tunable interlayer channels with a ternary heterostructure. The pivotal design lies in ion insertion into the two-dimensional (2D) membrane layers, achieving meticulous modulation of layer spacing based on ion hydration radius. Notably, the ensuing layer spacing within the hybrid ionic intercalation membrane occupies an intermediary realm, positioned astutely between small-sized hydrated ionic intercalation membrane spacing and their more extensive counterparts. This deliberate configuration accelerates the swift passage of diminutive hydrated ions while simultaneously impeding the movement of bulkier ions within the brine medium. The outcome is remarkable selectivity, demonstrated by the partitioning of K+/Li+ = 20.9, Na+/K+ = 31.2, and Li+/Mg2+ = 9.5 ion pairs. The ZIF-8/GO heterostructure significantly contributes to the selectivity, while the mechanical robustness and stability, improved by the ZA/GO heterostructure, further support its practical applicability. This report reports an advanced membrane design, offering promising prospects for lithium extraction and various ion separation processes.

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“…After a period of time, the nuclear fuel must be replaced, and the resulting waste is known as spent (or old) nuclear fuel (SNF). It still contains 95% uranium, which can be recycled to improve the utilization rate of uranium resources. − …”

Section: Introductionmentioning

confidence: 99%

Selective Separation of U(VI) from Pu(IV) by 2,9-Diamide-1,10-phenanthroline Ligands at High Acidity: Extraction and Coordination Chemistry

Liu,

Xiu,

Shehzad

et al. 2024

Inorg. Chem.

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During the PUREX process, the separation between U(VI) and Pu(IV) is achieved by reducing Pu(IV) to Pu(III), which is complicated and energy-consuming. To address this issue, we report here the first case of separation of U(VI) from Pu(IV) by o-phenanthroline diamide ligands under high acidity. Two new o-phenanthroline diamide ligands (1,10-phenanthroline-2,9-diyl)bis(indolin-1-ylmethanone) (L1) and (1,10-phenanthroline-2,9-diyl)bis((2-methylindolin-1-yl)methanone) (L2) were synthesized, which can effectively separate U(VI) from Pu(IV) even at 4 mol/L HNO3. The highest separation factor of U(VI) and Pu(IV) can reach over 1000, setting a new record for the separation of U(VI) from Pu(IV) under high acidity. Furthermore, extracted U(VI) can be easily recovered with water or dilute nitric acid, and the extraction performance remains stable even after 150 kGy gamma irradiation, which provides solid experimental support for potential engineering applications. The results of UV–vis titration and single-crystal X-ray diffraction measurements show that the 1:1 complex formed by L1 with U(VI) is more stable than all of the previously reported phenanthroline ligands, which reasonably reveals that the ligand L1 designed in this work has excellent affinity for U(VI). The findings of this work promise to contribute to the facilitation of the PUREX process by avoiding the use of reducing agents. It also provides new clues for designing ligands to achieve efficient separation between U(VI) and Pu(IV) at high acidity.

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Ion sieving in graphene oxide membrane enables efficient actinides/lanthanides separation

Cited by 42 publications

References 50 publications

Ion and water adsorption to graphene and graphene oxide surfaces

Ion and water adsorption to graphene and graphene oxide surfaces

Ternary Heterostructure Membranes with Two-Dimensional Tunable Channels for Highly Selective Ion Separation

Selective Separation of U(VI) from Pu(IV) by 2,9-Diamide-1,10-phenanthroline Ligands at High Acidity: Extraction and Coordination Chemistry

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