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A carbon nitride electrode for highly selective and sensitive determination of lead(II)

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Abstract

We have constructed a carbon nitride electrode modified with a bismuth film and show that it can be used for the electroanalysis of lead(II) by differential pulse anodic stripping voltammetry. The combination of such materials is shown to greatly improve the sensing capability of the electrode. Under the optimal conditions, the electrochemical response of the modified electrode is linearly related to the concentration of Pb(II) in the 6 – 1,000 nM concentration range (R = 0.9983). The detection limit is 2.0 pM (at an SNR of 3), and the sensitivity is 8 times better of that of respective graphite electrodes. The sensor enables rapid, highly sensitive, continuous, and environmentally friendly determination of trace levels of Pb(II) at affordable costs.

Graphite-like carbon nitride (g-C3N4) as a new electrode material shows high performance for the determination of Pb(II).

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Acknowledgments

The authors thank the National Natural Science Foundation of China (No. 21273080) for the financial support.

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, Guangzhou, 510640, People’s Republic of China

    Dong-Ping Wang, Yue Tang & Wei-De Zhang

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  1. Dong-Ping Wang
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  2. Yue Tang
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  3. Wei-De Zhang
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Correspondence to Wei-De Zhang.

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Wang, DP., Tang, Y. & Zhang, WD. A carbon nitride electrode for highly selective and sensitive determination of lead(II). Microchim Acta 180, 1303–1308 (2013). https://doi.org/10.1007/s00604-013-1051-2

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  • DOI: https://doi.org/10.1007/s00604-013-1051-2

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