Amorphous boron phosphide nanosheets: A highly efficient capacitive deionization electrode for uranium separation from seawater with superior selectivity

Chen, Lei; Tong, Dong Ge

doi:10.1016/j.seppur.2020.117175

Cited by 30 publications

(13 citation statements)

References 41 publications

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“…Chen et al. selectively removed uranium (VI) by CDI with an electrode made of boron phosphide nanosheets, reaching a maximum adsorption capacity of 2,584 mg g −1 ( Chen and Tong, 2020 ). Selectivity of uranium (VI) over competing metal ions was achieved with excess factors from 100 to 10 4 of Sr 2+ , Ba 2+ , VO 3− , Cr 3+ , Ca 2+ , Co 2+ , Cu 2+ , Mn 2+ , Mg 2+ , Ni 2+ , Fe 3+ , Na + , and K + .…”

Section: Electrochemical Separations For Selective Recoverymentioning

confidence: 99%

“…Selectivity of uranium (VI) over competing metal ions was achieved with excess factors from 100 to 10 4 of Sr 2+ , Ba 2+ , VO 3− , Cr 3+ , Ca 2+ , Co 2+ , Cu 2+ , Mn 2+ , Mg 2+ , Ni 2+ , Fe 3+ , Na + , and K + . The high selectivity of boron phosphide nanosheets for uranium (VI) was attributed to the strong coordination between phosphorus and uranium, and cyclic voltammetry showed no Faradaic reactions ( Chen and Tong, 2020 ). In addition, Liu et al.…”

Section: Electrochemical Separations For Selective Recoverymentioning

confidence: 99%

See 1 more Smart Citation

Electrochemical approaches for selective recovery of critical elements in hydrometallurgical processes of complex feedstocks

Kim¹,

Candeago²,

Rim³

et al. 2021

iScience

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Summary Critical minerals are essential for the ever-increasing urban and industrial activities in modern society. The shift to cost-efficient and ecofriendly urban mining can be an avenue to replace the traditional linear flow of virgin-mined materials. Electrochemical separation technologies provide a sustainable approach to metal recovery, through possible integration with renewable energy, the minimization of external chemical input, as well as reducing secondary pollution. In this review, recent advances in electrochemically mediated technologies for metal recovery are discussed, with a focus on rare earth elements and other key critical materials for the modern circular economy. Given the extreme heterogeneity of hydrometallurgically-derived media of complex feedstocks, we focus on the nature of molecular selectivity in various electrochemically assisted recovery techniques. Finally, we provide a perspective on the challenges and opportunities for process intensification in critical materials recycling, especially through combining electrochemical and hydrometallurgical separation steps.

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Section: Electrochemical Separations For Selective Recoverymentioning

confidence: 99%

Section: Electrochemical Separations For Selective Recoverymentioning

confidence: 99%

Electrochemical approaches for selective recovery of critical elements in hydrometallurgical processes of complex feedstocks

Kim¹,

Candeago²,

Rim³

et al. 2021

iScience

View full text Add to dashboard Cite

show abstract

“…The synergistic effect of EDLs and pseudocapacitance with hierarchical nanostructure leads to better electrosorption performance. In another study, Chen and Tong (2020) synthesized amorphous boron phosphide (BP) nanosheets for uranium separation from seawater by reaction of PCl 3 with B 2 H 6 in an ionic liquid ([BMIM]Cl) with the application of a plasma. The material exhibited specific capacitance of 179.3 F/g with specific surface area of 221.7 m 2 /g.…”

Section: Removal Of Radioactive Materialsmentioning

confidence: 99%

“…(a) Electrosorption capacities of individual and competitive metal ions in aqueous solution; (b) binding energy shifts of P and metal ions. Reprinted from Chen and Tong (2020)), copyright (2020), with permission from Elsevier…”

Section: Removal Of Radioactive Materialsmentioning

confidence: 99%

Recent progress in materials and architectures for capacitive deionization: A comprehensive review

Datar

Mane

Jha

2022

Water Environment Research

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Capacitive deionization is an emerging and rapidly developing electrochemical technique for water desalination across the globe with exponential growth in publications. There are various architectures and materials being explored to obtain utmost electrosorption performance. The symmetric architectures consist of the same material on both electrodes, while asymmetric architectures have electrodes loaded with different materials. Asymmetric architectures possess higher electrosorption performance as compared with that of symmetric architectures owing to the inclusion of either faradaic materials, redox‐active electrolytes, or ion specific pre‐intercalation material. With the materials perspective, faradaic materials have higher electrosorption performance than carbon‐based materials owing to the occurrence of faradaic reactions for electrosorption. Moreover, the architecture and material may be tailored in order to obtain desired selectivity of the target component and heavy metal present in feed water. In this review, we describe recent developments in architectures and materials for capacitive deionization and summarize the characteristics and salt removal performances. Further, we discuss recently reported architectures and materials for the removal of heavy metals and radioactive materials. The factors that affect the electrosorption performance including the synthesis procedure for electrode materials, incorporation of additives, operational modes, and organic foulants are further illustrated. This review concludes with several perspectives to provide directions for further development in the subject of capacitive deionization. Practitioner Points Capacitive deionization (CDI) is a rapidly developing electrochemical water desalination technique with exponential growth in publications. Faradaic materials have higher salt removal capacity (SAC) because of reversible redox reactions or ion‐intercalation processes. Combination of CDI with other techniques exhibits improved selectivity and removal of heavy metals. Operational parameters and materials properties affect SAC. In future, comprehensive experimentation is needed to have better understanding of the performance of CDI architectures and materials.

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“…Electrosorption, in which an electrical field induces ion migration toward the oppositely charged electrode with subsequent entrapment within the electrical double layer (EDL) formed at the electrode–electrolyte interface, represents a promising technology to eliminate various harmful or problematic species (e.g., fluoride, , ammonium, nitrate, arsenic, , and uranium , ) from aqueous solution with low energy and chemical consumption. While capacitive ion storage is a predominant electrochemical process in an electrosorption system, inevitable Faradaic reactions (e.g., water electrolysis and oxygen reduction) may, depending on the applied potential, also occur simultaneously. , While these reactions may have a negative influence on the electrosorption performance and system stability, they could also be utilized beneficially for the removal and recovery of amphoteric ions such as ammonium, phosphate, and borate.…”

Section: Introductionmentioning

confidence: 99%

Boron Removal from Reverse Osmosis Permeate Using an Electrosorption Process: Feasibility, Kinetics, and Mechanism

Sun

Zhang

Song

et al. 2022

Environ. Sci. Technol.

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Boron is present in the form of boric acid (B(OH)3 or H3BO3) in seawater, geothermal waters, and some industrial wastewaters but is toxic at elevated concentrations to both plants and humans. Effective removal of boron from solutions at circumneutral pH by existing technologies such as reverse osmosis is constrained by high energy consumption and low removal efficiency. In this work, we present an asymmetric, membrane-containing flow-by electrosorption system for boron removal. Upon charging, the catholyte pH rapidly increases to above ∼10.7 as a result of water electrolysis and other Faradaic reactions with resultant deprotonation of boric acid to form B(OH)4 – and subsequent removal from solution by electrosorption to the anode. Results also show that the asymmetric flow-by electrosorption system is capable of treating feed streams with high concentrations of boron and RO permeate containing multiple competing ionic species. On the basis of the experimental results obtained, a mathematical model has been developed that adequately describes the kinetics and mechanism of boron removal by the asymmetric electrosorption system. Overall, this study not only provides new insights into boron removal mechanisms by electrosorption but also opens up a new pathway to eliminate amphoteric pollutants from contaminated source waters.

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Amorphous boron phosphide nanosheets: A highly efficient capacitive deionization electrode for uranium separation from seawater with superior selectivity

Cited by 30 publications

References 41 publications

Electrochemical approaches for selective recovery of critical elements in hydrometallurgical processes of complex feedstocks

Electrochemical approaches for selective recovery of critical elements in hydrometallurgical processes of complex feedstocks

Recent progress in materials and architectures for capacitive deionization: A comprehensive review

Boron Removal from Reverse Osmosis Permeate Using an Electrosorption Process: Feasibility, Kinetics, and Mechanism

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