College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, Henan, 454000, China.
College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, Henan, 454000, China.
Talanta. 2024 Nov 1;279:126617. doi: 10.1016/j.talanta.2024.126617. Epub 2024 Jul 27.
Tetracycline (TC) and copper ion (Cu), as important additives in animal feed, play a crucial role in disease prevention and growth regulation. However, the abuse leads to concentration accumulation, which seriously threatens human health and the ecological environment. There is an urgent need to develop a detection method to achieve fast and synchronous detection of these pollutants without cross-interference. Here, a carbon dots-doped lanthanide-based fluorescent nanosensor (CDs@Tb-MOFs@SiO-NH-Eu) was synthesized, which can detect TC in the 380 nm channel by "antenna effect" and internal filtering effects (IFE), and identify Cu in the 320 nm channel. The sensor was highly sensitive to TC within 0-4 μM with a detection limit as low as 3.64 nM, and Cu could be detected within 0-40 μM with a detection limit of 38 nM. A portable dual-channel visual fluorescence sensor was obtained by loading the probes onto test paper and cotton swabs in food samples, which indicates the practicability of this sensing strategy.
四环素（TC）和铜离子（Cu）作为动物饲料中的重要添加剂，在疾病预防和生长调节中起着至关重要的作用。然而，滥用会导致浓度积累，严重威胁人类健康和生态环境。因此，迫切需要开发一种检测方法，以实现对这些污染物的快速和同步检测，而不会产生交叉干扰。在这里，合成了一种碳点掺杂的镧系荧光纳米传感器（CDs@Tb-MOFs@SiO-NH-Eu），它可以通过“天线效应”和内滤效应（IFE）在 380nm 通道中检测 TC，并在 320nm 通道中识别 Cu。该传感器对 TC 的检测范围为 0-4μM，检测限低至 3.64nM，对 Cu 的检测范围为 0-40μM，检测限为 38nM。通过将探针加载到试纸和棉签上，在食品样品中获得了便携式双通道可视化荧光传感器，表明了这种传感策略的实用性。
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