Fabrication of cobalt–nitrogen–carbon composite anchored on MXene for efficient photoelectrocatalytic reduction of U(VI)

IF 3.5 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Journal of Solid State Chemistry Pub Date : 2025-07-22 DOI:10.1016/j.jssc.2025.125532

Yu Liu, Changting Chen, Jianqiang Luo, Shujuan Liu, Jianguo Ma

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引用次数: 0

Abstract

Photoelectrocatalytic (PEC) reduction of soluble U(VI) to insoluble U(IV) represents a highly promising strategy for uranium removal. The design of photoelectrode materials with superior photoelectrochemical performance is crucial for enhancing PEC efficiency. In this study, an MXene-supported Co-NC (Co-NC/MXene) photoelectrode was successfully fabricated through electrostatic self-assembly. Compared to individual electrocatalytic (EC) and photocatalytic (PC) systems, the PEC system achieved an optimal U(VI) removal efficiency of 99.1 % with a rate constant of 0.116 min⁻¹, demonstrating reaction rates 13.4 times and 29.3 times higher than those of EC and PC systems, respectively. The Co-NC/MXene electrode exhibited exceptional adsorption capacity (3993.54 mg g⁻¹ for 500 ppm) and maintained over 80 % removal efficiency after six consecutive cycles, highlighting its outstanding stability. This work provides novel insights into the application of MOF-derived/MXene materials for highly efficient U(VI) removal from aqueous solutions.

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MXene固载钴氮碳复合材料的制备及其高效光电催化还原U（VI）的研究

光电催化（PEC）将可溶性铀（VI）还原为不溶性铀（IV）是一种非常有前途的除铀策略。设计具有优异光电化学性能的光电极材料是提高光电催化效率的关键。在本研究中，通过静电自组装成功制备了MXene负载的Co-NC （Co-NC/MXene）光电极。与单独的电催化（EC）和光催化（PC）系统相比，PEC系统的U（VI）去除效率为99.1%，速率常数为0.116 min−1，反应速率分别是EC和PC系统的13.4倍和29.3倍。Co-NC/MXene电极表现出优异的吸附能力（在500 ppm时为3993.54 mg g−1），在连续6次循环后，其去除率保持在80%以上，突出了其出色的稳定性。这项工作为mof衍生/MXene材料在水溶液中高效去除U（VI）的应用提供了新的见解。

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来源期刊

Journal of Solid State Chemistry 化学-无机化学与核化学

CiteScore

6.00

自引率

9.10%

发文量

848

审稿时长

25 days

期刊介绍： Covering major developments in the field of solid state chemistry and related areas such as ceramics and amorphous materials, the Journal of Solid State Chemistry features studies of chemical, structural, thermodynamic, electronic, magnetic, and optical properties and processes in solids.