Economical, Green Synthesis of Fluorescent Carbon Nanoparticles and Their Use as Probes for Sensitive and Selective Detection of Mercury(II) Ions
Analytical Chemistry2012Vol. 84(12), pp. 5351–5357
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Wenbo Lu, Xiaoyun Qin, Sen Liu, Guohui Chang, Yingwei Zhang, Yonglan Luo, Abdullah M. Asiri, Abdulrahman O. Al‐Youbi, Xuping Sun
Abstract
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.
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