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Simultaneous detection of Cd(II) and Pb(II) by differential pulse anodic stripping voltammetry at a nitrogen-doped microporous carbon/Nafion/bismuth-film electrode
Xiao, Lili; Xu, Hongbo; Zhou, Shenghai; Song, Ting; Wang, Huanhuan; Li, Shouzhu; Gan, Wei; Yuan, Qunhui
2014
Source PublicationElectrochimica Acta
ISSN134686
Volume143Issue:10Pages:143-151
AbstractRecently, metal-organic frameworks (MOFs) and their carbon derivates have been demonstrated as new electrode modifying materials for electrochemical sensing. In this work, the first example of the detection of heavy metal ions with a MOF-derived sensing platform was presented. The platform was based on a glassy carbon electrode (GCE) modified by Nafion-bismuth/nitrogen doped microporous carbon (NMC) composite, in which the NMC was derived from a zeolitic imidazolate framework-8 (ZIF-8). The good dispersibility, large specific surface area (941 m2 g-1), high nitrogen content (25.0 at.%) and good electrical conductivity of the NMC materials, as well as the synergistic effects of Nafion and bismuth-film contributed to the enhanced signals of the electrode during the differential pulse anodic stripping voltammetry (DPASV) measurements for simultaneous detection of trace Cd(II) and Pb(II) in aqueous solution. The calibration curves for Cd(II) covered two linear ranges varying from 2 to 10 μg L-1 and 10 to 100 μg L-1. As for Pb(II), the linear calibration curves ranged from 0.5 to 10 μg L-1 and 10 to 100 μg L-1. The detection limits were estimated to be 1.5 μg L-1 (S/N = 3) for Cd(II) and 0.05 μg L-1 (S/N = 3) for Pb(II), which were 2 times and 200 times lower than the guideline values of drinking water given by the World Health Organization (WHO), for Cd(II) and Pb(II), respectively. In addition, the good reproducibility and stability of the modified electrode offered a promising perspective for the detection of trace metal ions in practice. Compared with other porous carbon modified electrodes that obtained by either drop-casting or screen-printing method, the proposed Nafion/Bi/NMC/GCE showed a much lower detection limit for Pb(II) and a lower or comparable detection limit for Cd(II). Moreover, the obtaining of uniformly ordered N-doped carbon polyhedron could shed light on the preparation of other heteroatom-doped electrode modifying materials for the detection of heavy metal ions.
DOI10.1016/j.electacta.2014.08.021
Indexed BySCI
WOS IDWOS:000343626500019
Citation statistics
Cited Times:99[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xjipc.cas.cn/handle/365002/3926
Collection环境科学与技术研究室
Corresponding AuthorZhou, Shenghai
AffiliationChinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Lab Environm Sci & Technol, Key Lab Funct Mat & Devices Special Environm, Urumqi 830011, Peoples R China;Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Xiao, Lili,Xu, Hongbo,Zhou, Shenghai,et al. Simultaneous detection of Cd(II) and Pb(II) by differential pulse anodic stripping voltammetry at a nitrogen-doped microporous carbon/Nafion/bismuth-film electrode[J]. Electrochimica Acta,2014,143(10):143-151.
APA Xiao, Lili.,Xu, Hongbo.,Zhou, Shenghai.,Song, Ting.,Wang, Huanhuan.,...&Yuan, Qunhui.(2014).Simultaneous detection of Cd(II) and Pb(II) by differential pulse anodic stripping voltammetry at a nitrogen-doped microporous carbon/Nafion/bismuth-film electrode.Electrochimica Acta,143(10),143-151.
MLA Xiao, Lili,et al."Simultaneous detection of Cd(II) and Pb(II) by differential pulse anodic stripping voltammetry at a nitrogen-doped microporous carbon/Nafion/bismuth-film electrode".Electrochimica Acta 143.10(2014):143-151.
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