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- W4297181311 abstract "As an energy-efficient and eco-friendly technique, capacitive deionization (CDI) has shown great potential for uranium (U(VI)) capture recently. However, extracting U(VI) with high kinetics, capacity and selectivity remains a major challenge due to the current surface active sites-based material and co-existing ions in aqueous solution. Here we rationally designed a layered 2D/2D niobium phosphate/holey graphene (HGNbP) electrode material, and originally demonstrated its efficient U(VI) capture ability via an electro-adsorption and electrocatalytic reduction coupling process. The less-accumulative loose layered architecture, open polycrystalline construction of niobium phosphate with active phosphate sites, and rich in-plane nano-pores on conductive graphene nanosheets endowed HGNbP with fast charge/ion transport, high electroconductivity and superior pseudocapacitance, which enabled U(VI) ions first to be electro-adsorbed, then physico-chemical adsorbed, and finally electrocatalysis reduced/deposited onto electrode surface without the limitation of active sites under a low potential of 1.2 V. Based on these virtues, the HGNbP exhibited a fast adsorption kinetics, with a high removal rate of 99.9% within 30 min in 50 mg L-1 U(VI) solution, and a high adsorption capacity up to 1340 mg g-1 in 1000 mg L-1 U(VI) solution. Furthermore, the good recyclability and selectivity towards U(VI) were also realized." @default.
- W4297181311 created "2022-09-27" @default.
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- W4297181311 date "2023-01-01" @default.
- W4297181311 modified "2023-10-17" @default.
- W4297181311 title "Uranium capture by a layered 2D/2D niobium phosphate/holey graphene architecture via an electro-adsorption and electrocatalytic reduction coupling process" @default.
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- W4297181311 doi "https://doi.org/10.1016/j.jhazmat.2022.130054" @default.
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