A three-dimensional luminescent covalent organic framework for rapid, selective, and reversible uranium detection and extraction
A three-dimensional luminescent covalent organic framework for rapid, selective, and reversible uranium detection and extraction
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DOI：
10.1016/j.seppur.2022.122726
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发表时间：
2022-11
影响因子：
8.6
通讯作者：
Wei-Rong Cui;Yi-Ru Chen;Wei Xu;Kaijun Liu;Wei-Bin Qiu;Yibao Li;Jianding Qiu
中科院分区：
文献类型：
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作者：
Wei-Rong Cui;Yi-Ru Chen;Wei Xu;Kaijun Liu;Wei-Bin Qiu;Yibao Li;Jianding Qiu
铀是核反应的关键燃料，但泄漏到环境中也会对人类造成严重的公共卫生问题。探索同时检测和提取铀的新策略对于公共卫生和环境保护来说是非常必要的。在此，合成了具有强荧光和 3D 互连孔道的羟基功能化 3D 共价有机框架（称为 TAPM-DHBD），并对其用于铀检测和提取进行了评估。 TAPM-DHBD 表现出 955.3 mg g−1 的优异铀提取能力以及快速动力学，因为 3D 互连微孔骨架的极其容易进入的孔通道上有大量的选择性结合位点。有趣的是，由于3D共轭骨架的信号放大，它具有2 s的快速响应时间和4.08 nM UO22+的超低检测限，适合对提取水中的放射性铀污染进行灵敏的现场监测。此外，TAPM-DHBD 在至少六个循环中表现出优异的可再生性能。这项研究为构建用于放射性污染监测和战略核素提取的高性能 3D COF 提供了一种新策略。
Uranium is a key fuel for nuclear reactions, but it also causes serious public health concerns to human beings when leaked into the environment. Exploring new strategies for simultaneous uranium detection and extraction is highly desirable for public health and environmental protection. Herein, a hydroxyl-functionalized 3D covalent organic framework (termed TAPM-DHBD) with strong fluorescence and 3D interconnected pore channels is synthesized and evaluated for uranium detection and extraction. TAPM-DHBD exhibits an exceptional uranium extraction capacity of 955.3 mg g−1as well as fast kinetics due to the plentiful selective binding sites on the extremely accessible pore channels of 3D interconnected micropore skeleton. Interestingly, due to the signal amplification of the 3D conjugated skeleton, it has a rapid-response time of 2 s and an ultra-low detection limit of 4.08 nM UO22+suitable for sensitive and on-site monitoring the radioactive uranium contamination of the extracted water. Furthermore, TAPM-DHBD exhibits excellent regenerable performance at least six cycles. This study provides a new strategy for constructing high-performance 3D COFs for radioactive contamination monitoring and strategic nuclides extraction.