Li Fenglan, Lu Liqin, Wu Yutong, Meng Liang, Zhu Binling, Xu Quanming, Zhuang Guoxin, Zhuang Junyang
Department of Forensic Science, Fujian Police College, Fuzhou, 350007, China.
The Higher Educational Key Laboratory for Nano Biomedical Technology of Fujian Province, School of Pharmacy, Fujian Medical University, Fuzhou, 350122, China.
J Fluoresc. 2024 Oct 23. doi: 10.1007/s10895-024-04010-2.
Nitrogen and sulfur co-doped carbon dots (N, S-CDs) were prepared for dual-channel ratiometric fluorescence determination of mercury ions (Hg). The dual-emission N, S-CDs were synthesized using a simple one-pot hydrothermal treatment. When excited with visible light, N,S-CDs exhibited two emission peaks at 390 and 500 nm. Notably, the presence of Hg caused a considerable decrease in the fluorescence of N, S-CDs at 500 nm, mainly due to the static quenching effect. In comparison, the fluorescence at 390 nm was almost unchanged. With a limit of detection (LOD) of 0.21 µM for Hg, the N, S-CDs were successfully applied to the unlabeled ratiometric fluorescence determination of Hg in actual water samples with good recoveries (94.5-107.8%). In conclusion, this developed ratiometric fluorescent sensor provides a reliable, environmentally friendly, rapid, and efficient platform for detecting Hg in environmental applications.
制备了氮硫共掺杂碳点（N，S-CDs）用于汞离子（Hg）的双通道比率荧光测定。采用简单的一锅水热法合成了具有双发射的N，S-CDs。当用可见光激发时，N，S-CDs在390和500nm处呈现两个发射峰。值得注意的是，Hg的存在导致N，S-CDs在500nm处的荧光显著降低，这主要是由于静态猝灭效应。相比之下，390nm处的荧光几乎不变。该N，S-CDs对Hg的检测限为0.21μM，已成功应用于实际水样中Hg的无标记比率荧光测定，回收率良好（94.5-107.8%）。总之，这种开发的比率荧光传感器为环境应用中检测Hg提供了一个可靠、环保、快速且高效的平台。
