State Key Lab of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, P. R. China.
Anal Chem. 2012 Jun 19;84(12):5351-7. doi: 10.1021/ac3007939. Epub 2012 Jun 11.
The present article reports on a simple, economical, and green preparative strategy toward water-soluble, fluorescent carbon nanoparticles (CPs) with a quantum yield of approximately 6.9% by hydrothermal process using low cost wastes of pomelo peel as a carbon source for the first time. We further explore the use of such CPs as probes for a fluorescent Hg(2+) detection application, which is based on Hg(2+)-induced fluorescence quenching of CPs. This sensing system exhibits excellent sensitivity and selectivity toward Hg(2+), and a detection limit as low as 0.23 nM is achieved. The practical use of this system for Hg(2+) determination in lake water samples is also demonstrated successfully.
本文首次报道了一种简单、经济、绿色的水相制备策略，通过水热法以柚子皮这种廉价的废料为碳源，制备出具有约 6.9%量子产率的水溶性荧光碳纳米粒子（CPs）。我们进一步探索了将这些 CPs 用作荧光 Hg(2+)检测应用的探针，这是基于 CPs 被 Hg(2+)诱导荧光猝灭。该传感体系对 Hg(2+)具有优异的灵敏度和选择性，检测限低至 0.23 nM。该系统还成功地用于实际湖水样品中 Hg(2+)的测定。
