State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering and Environment, China University of Petroleum-Beijing, Beijing, 102249, China.
State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering and Environment, China University of Petroleum-Beijing, Beijing, 102249, China; School of Environment, Henan Normal University, Xinxiang, 453007, PR China.
Chemosphere. 2022 Dec;308(Pt 2):136268. doi: 10.1016/j.chemosphere.2022.136268. Epub 2022 Sep 1.
Nitrogen and sulfur element co-decorated carbon nanodots (N,S-CDs) were synthesized by solid state hydrothermal method utilizing mercaptoacetic acid and melamine as the precursors. The obtained N,S-CDs had wonderful optical and chemical stability. The experimental results demonstrated that silver nanoparticles (AgNPs) could noticeably quench the fluorescence of N,S-CDs. The quenching of fluorescence signal from the presence of AgNPs may be attributed to inner filter effect. The crafted nanoprobe for sensing AgNPs was endowed with some specialties such as simplicity, excellent selectivity and sensitivity, environmental friendliness and low cost. The probe exhibited specific linearity from 0.024 to 1.77 nM, and was endowed a good limit of detection down to 0.022 nM. The experimental results demonstrated that the built probe could be an efficient tool for AgNPs detection and had a prospective application, and also provided a new direction for establishing innovative method for determining and monitoring pollutants from nanoparticles.
氮硫共掺杂碳点（N,S-CDs）通过固态水热法利用巯基乙酸和三聚氰胺作为前驱体制备。得到的 N,S-CDs 具有良好的光学和化学稳定性。实验结果表明，银纳米粒子（AgNPs）可以显著猝灭 N,S-CDs 的荧光。荧光信号的猝灭可能归因于内滤效应。所构建的用于检测 AgNPs 的纳米探针具有简单、选择性和灵敏度高、环保和成本低等特点。该探针在 0.024 到 1.77 nM 之间表现出特定的线性关系，检测限低至 0.022 nM。实验结果表明，所构建的探针可以作为 AgNPs 检测的有效工具，具有广阔的应用前景，并为建立纳米粒子污染物的测定和监测的创新方法提供了新的方向。
