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Loading Actinides in Multilayered Structures for Nuclear Waste Treatment: The First Case Study of Uranium Capture with Vanadium Carbide MXene

Lin WangInstitute of High Energy PhysicsLi‐Yong YuanInstitute of High Energy PhysicsKe ChenNingbo Institute of Industrial TechnologyYujuan ZhangInstitute of High Energy PhysicsQihuang DengNingbo Institute of Industrial TechnologyShiyu DuNingbo Institute of Industrial TechnologyQing HuangNingbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, ChinaLirong ZhengBeijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, ChinaJing ZhangBeijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, ChinaZhifang ChaiLaboratory of Nuclear Energy Chemistry and Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, ChinaMichel W. BarsoumDepartment of Materials Science and Engineering and A. J. Drexel Nanomaterials Institute, Drexel University, Philadelphia, Pennsylvania 19104, United StatesXiangke WangSchool of Environment and Chemical Engineering, North China Electric Power University, Beijing 102206, ChinaWei‐Qun ShiInstitute of High Energy Physics

2016en

Ochiq kirish: yoʻq

ABI

Annotatsiya

Efficient nuclear waste treatment and environmental management are important hurdles that need to be overcome if nuclear energy is to become more widely used. Herein, we demonstrate the first case of using two-dimensional (2D) multilayered V2CTx nanosheets prepared by HF etching of V2AlC to remove actinides from aqueous solutions. The V2CTx material is found to be a highly efficient uranium (U(VI)) sorbent, evidenced by a high uptake capacity of 174 mg g(-1), fast sorption kinetics, and desirable selectivity. Fitting of the sorption isotherm indicated that the sorption followed a heterogeneous adsorption model, most probably due to the presence of heterogeneous adsorption sites. Density functional theory calculations, in combination with X-ray absorption fine structure characterizations, suggest that the uranyl ions prefer to coordinate with hydroxyl groups bonded to the V-sites of the nanosheets via forming bidentate inner-sphere complexes.

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Identifikatorlar

DOI: 10.1021/acsami.6b02989

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