College of Pharmacy, Henan University of Chinese Medicine, Zhengzhou, 450046, China.
College of Chinese Medical Sciences, Henan University of Chinese Medicine, Zhengzhou, 450046, China.
Chemosphere. 2022 Mar;291(Pt 1):132827. doi: 10.1016/j.chemosphere.2021.132827. Epub 2021 Nov 8.
In this work, a series of bimetallic Cd/Zr-UiO-66 materials were successfully synthesized for fluorescence sensing toward traces of As and Fe via a one-pot method. Interestingly, the obtained bimetallic Cd/Zr-UiO-66 (1:9) can be served as turn-on probe for As as well as turn-off probe for Fe. The LODs of Cd/Zr-UiO-66 (1:9) toward As and Fe were calculated to be 5.4 μM and 4.3 μM, respectively, indicating its effective sensing properties for As and Fe in methanol media. Moreover, even in the presence of other potentially interfering toxic metal ions such as As, Cd and Pb, Cd/Zr-UiO-66 (1:9) still presented good anti-interference abilities. Additionally, the removal efficiency of Cd/Zr-UiO-66 (1:9) toward As was higher than 70% when the initial As was lower than 50 mg/L. The fluorescence quenching of Fe were mainly due to the competitive absorption of excitation source and RET, while the ACE mechanism was mostly responsible for the enhancement of As. More importantly, this job might pave the way for future researches and applications on sensing As and Fe.
在这项工作中，通过一锅法成功合成了一系列双金属 Cd/Zr-UiO-66 材料，用于通过荧光传感痕量的 As 和 Fe。有趣的是，所得到的双金属 Cd/Zr-UiO-66（1:9）可以作为 As 的开启探针以及 Fe 的关闭探针。Cd/Zr-UiO-66（1:9）对 As 和 Fe 的 LOD 分别计算为 5.4 μM 和 4.3 μM，表明其在甲醇介质中对 As 和 Fe 具有有效的传感性能。此外，即使在存在其他潜在干扰毒性金属离子如 As、Cd 和 Pb 的情况下，Cd/Zr-UiO-66（1:9）仍表现出良好的抗干扰能力。此外，当初始 As 浓度低于 50mg/L 时，Cd/Zr-UiO-66（1:9）对 As 的去除效率高于 70%。Fe 的荧光猝灭主要归因于激发源和 RET 的竞争性吸收，而 ACE 机制主要负责增强 As。更重要的是，这项工作可能为未来关于 As 和 Fe 传感的研究和应用铺平道路。
