One-pot green synthesis of nitrogen-doped carbon nanoparticles as fluorescent probes for mercury ions

Huang, Hong; Lv, Jing-Jing; Zhou, Dan-Ling; Bao, Ning; Xu, Yue; Wang, Ai-Jun; Feng, Jiu-Ju

One-pot green synthesis of nitrogen-doped carbon nanoparticles as fluorescent probes for mercury ions

2013

Herein, a simple, green, and low-cost way was developed in the synthesis of fluorescent nitrogen-doped carbon nanoparticles (FNCPs) with nitrogen content of 6.88%, using one-pot hydrothermal treatment of strawberry juice. The as-prepared FNCPs exhibited a maximum emission at 427 nm with a quantum yield of 6.3%, which could be specifically quenched by Hg²⁺. This phenomenon was used to develop a fluorescent method for facile detection of Hg²⁺ with a linear range from 10 nM to 50 μM and a detection limit of 3 nM (S/N = 3), and further extended to measure environmental water samples with satisfactory recovery. This study provides a green strategy in the synthesis of FNCPs to detect Hg²⁺ with good performance.

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