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

作者：Wang Dong Ping; Tang Yue; Zhang Wei De^*

来源：Microchimica Acta, 2013, 180(13-14): 1303-1308.

DOI：10.1007/s00604-013-1051-2

• Carbon nitride
• Lead ion
• Differential pulse anodic stripping voltammetry
• Electroanalysis

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.

• 出版日期2013-10
• 单位华南理工大学