六价铬
锆
检出限
金属有机骨架
猝灭(荧光)
化学
双功能
光催化
荧光
水溶液中的金属离子
人体净化
铬
金属
无机化学
核化学
吸附
物理化学
色谱法
有机化学
核物理学
催化作用
物理
量子力学
作者
Xiaojun Hu,Yajing Zhang,Huan Liu,Mei Zhan,Jie Chen,Zhenmin Liu,Jie Chen
标识
DOI:10.1021/acs.jafc.3c05409
摘要
The simultaneous analysis and removal of highly toxic hexavalent chromium (Cr (VI)) in contaminated water via an easy method remain a serious task. Based on the guidance of bibliometric analysis, a thiadiazole ligand-modified zirconium metal–organic framework (Zr-MOF) heralds a new and simple approach to Cr (VI) treatment. The concentration can be determined by fluorescence quenching with a low detection limit of 1.4 μM and a high quenching constant of 6.88 × 103 M–1. For the sensing mechanism, the fluorescence intensity of the Zr-MOF decreased rapidly due to the competition of Cr (VI) with the Zr-MOF for absorption excitation energy and the induction of Zr-MOF aggregation. The analysis system also displayed satisfactory stability and applicability. Apart from sensing application, Zr-MOF can convert Cr (VI) to Cr (III), and the reduction rate constant was 0.004 min–1 under irradiation. Therefore, the bifunctional Zr-MOF provided a potential application method for controlling the pollution caused by Cr (VI) in wastewater.
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