Zirconium-based MOF/MXene aerogel composite for highly stable and selective capture of uranium from aqueous solution

IF 6.9 2区材料科学 Q2 CHEMISTRY, PHYSICAL Applied Surface Science Pub Date : 2025-09-01 Epub Date: 2025-04-20 DOI:10.1016/j.apsusc.2025.163323

Wenting Li , Wei Kang , Chengan Ye , Nina Wu , Feihong Wang , Huan Pang

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Abstract

Excessive discharge of uranyl ion (U(VI)-containing) wastewater poses significant environmental and human health risks due to radiological contamination. In this study, a metal–organic framework (MOF) exhibiting aerogel-like properties was synthesized by combining UiO-66-NH₂ with MXene through a freeze-drying process. The research focused on the removal of U(VI) from aqueous solutions with this aerogel material. The adsorption isotherm was consistent with the Langmuir model, and the maximum adsorption capacity was determined to be 229.1 mg∙g⁻¹. The aerogel-like MOF possesses a mesoporous structure, enhancing its U(VI) adsorption efficiency while enabling easy separation and maintaining structural integrity afterward. In cyclic adsorption–desorption experiments conducted over five cycles, the UiO-66-NH₂/MXene adsorbent demonstrated a U(VI) removal efficiency exceeding 96 %. Overall, the aerogel-like MOF demonstrates outstanding U(VI) adsorption capacity and shows promise as an effective capacitive deionization (CDI) electrode for mitigating radiological contamination.

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锆基MOF/MXene气凝胶复合材料对水溶液中铀的高稳定性和选择性捕获

由于放射性污染，铀酰离子（含U(VI)）废水的过量排放对环境和人类健康构成重大风险。在本研究中，将UiO-66-NH2与MXene通过冷冻干燥工艺合成了具有气凝胶样性能的金属有机骨架（MOF）。研究了该气凝胶材料对水溶液中U（VI）的去除效果。吸附等温线符合Langmuir模型，最大吸附量为229.1 mg∙g−1。气凝胶状MOF具有介孔结构，提高了其对U（VI）的吸附效率，同时易于分离并保持结构完整性。在5个循环的循环吸附-解吸实验中，UiO-66-NH2/MXene吸附剂对U（VI）的去除率超过96% %。总的来说，气凝胶状MOF具有出色的U（VI）吸附能力，并有望成为一种有效的电容性去离子（CDI）电极，用于减轻放射性污染。

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来源期刊

Applied Surface Science 工程技术-材料科学：膜

CiteScore

12.50

自引率

7.50%

发文量

3393

审稿时长

67 days

期刊介绍： Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.