Citation: CUI Wen-Yu, SUN Yan-Chun, LYU Jiang-Wei, GENG Lin. Bi₂O₃@graphene-modified Glassy Carbon Electrode for Detection of Lead and Cadmium by Anodic Stripping Voltammetry[J]. Chinese Journal of Analytical Chemistry, ;2018, 46(11): 1748-1754. doi: 10.11895/j.issn.0253-3820.171426 shu

Bi₂O₃@graphene-modified Glassy Carbon Electrode for Detection of Lead and Cadmium by Anodic Stripping Voltammetry

¹ Post-doctoral Mobile Station of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;
² School of Pharmacy, Harbin University of Commerce, Harbin 150076, China;
³ Hei Long Jiang River Fisheries Research Institute of Chinese Academy of Fishery Sciences, Harbin 150070, China

Received Date: 17 November 2017
Revised Date: 21 September 2018

Fund Project: This work was supported by the National Natural Science Foundation of China (No. 31370764) and the Fundamental Research Funds for Chinese Academy of Fishery Science (No. 2016HY-ZD1205).

Bi₂O₃@graphene material, fabricated by hydrothermal and self-assembly technology, was used to modify glassy carbon electrode. In this way, the electrochemical reaction activity sites were increased due to high specific surface area, and the pore structure of graphene sheet was favorable of electron transfer. Based on this, a new method for simultaneous determination of trace Pb²⁺ and Cd²⁺ was established by using anodic stripping voltammetry. The anodic stripping voltammetry response exhibited linear relationship with concentrations of Pb²⁺ and Cd²⁺ in the ranges of 10-200 μg/L and 25-200 μg/L, respectively. The detection limits were 0.02 μg/L and 0.25 μg/L for Pb²⁺ and Cd²⁺, respectively, with a deposition time of 120 s. The Bi₂O₃@graphene-modified glass carbon electrode exhibited high sensitivity, selectivity and stability, and were applied to determine Cd²⁺ and Pb²⁺ in real waste water samples, and the results were consistent with those determination results of inductively coupled plasmon-atomic emission spectrometry, indicating the good potential of Bi₂O₃-modified electrode in detection of trace heavy metal ions.
- Bismuth trioxide,
- Graphene,
- Anodic stripping voltammetry,
- Lead ion,
- Cadmium ion
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通讯作者: 陈斌, bchen63@163.com

Bi₂O₃@graphene-modified Glassy Carbon Electrode for Detection of Lead and Cadmium by Anodic Stripping Voltammetry