铀
铀酰
卟啉
吸附
环境修复
水溶液中的金属离子
光催化
化学
介孔材料
金属
选择性
放射性废物
废水
材料科学
无机化学
核化学
光化学
催化作用
污染
有机化学
废物管理
生态学
生物
冶金
工程类
作者
Tao Liu,Jie Wang,Tao Wei,Mengwei Chen,Anping Gu,Xi Guo,Ning Wang
标识
DOI:10.1016/j.seppur.2023.123601
摘要
The elimination of highly radioactive and chemically toxic uranium from nuclear waste is of significance for radionuclide remediation and environment protection. Herein, two-dimensional (2D) porphyrin-based nickel (Ni-TCPP) metal–organic frameworks (MOFs) are successfully prepared by a simple surfactant-assisted strategy. Owing to highly accessible active sites and low diffusion barrier, 2D Ni-TCPP nanosheets present fast uranium capture by coordination of uranyl ions with TCPP ligands and Ni paddlewheel metal nodes. Particularly, 2D Ni-TCPP nanosheets display outstanding photocatalytic activity due to the merit of dual ligand-to-metal charge transfer pathways, greatly improving photoreduction-assisted uranium recovery performance. As a result, light-irradiated 2D Ni-TCPP adsorbents display fast removal of uranium from acidic wastewater, excellent selectivity and good reusability. Moreover, a high uranium removal rate can be maintained even in the presence of excess calcium ions. These advantages combined with good structure stability make 2D Ni-TCPP MOFs promising for selective uranium separation in nuclear waste remediation.
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