期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 760, 期 -, 页码 52-58出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2015.11.043
关键词
Nitrogen doped graphene; Simultaneous determination; Heavy metal ions; Differential pulse stripping voltammetry; Sensor
资金
- National Natural Science Foundation of China [51302117, 51272096]
- Natural Science Foundation of Jiangxi Province [20122BAB216011, 20151BAB203018]
- Jiangxi Provincial Department of Education [GJJ13258]
- Science and Technology Landing Plan of Universities in Jiangxi province [KJLD12081, KJLD14069]
- Postdoctoral Science Foundation of China [2014M551857, 2015T80688]
- Postdoctoral Science Foundation of Jiangxi Province [2014KY14]
- Jiangxi Provincial Innovation Fund of Postgraduates [YC2015-S394]
Toxic heavy-metal ions are well known to be severely harmful to human health. Therefore, the development of fast and sensitive methods for their detection has drawn a great attention in recent years. Herein, a sensitive electrochemical platform for the simultaneous determination of Cd2+, Pb2+, Cu2+, and Hg2+ has been constructed based on N-doped graphene (NG) modified electrode using differential pulse stripping voltammetry (DPSV). NG was synthesized by a facile, efficient and green electrochemical method. The structure and composition of NG were studied by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray photoelectron microscopy (XPS) techniques, chronocoulometry and N-2 adsorption-desorption measurements. The NG modified electrode showed excellent catalytic activity for selective detection of Cd2+, Pb2+, Cu2+, and Hg2+ due to its particular structure and unique electronic properties. Under optimal conditions, the limits of detection were estimated to be 0.05 mu M for Cd2+ and Hg2+, 0.005 mu M for Pb2+ and Cu2+, respectively. Finally, the method was applied to the simultaneous detection of trace metal ions in the tap water samples. (C) 2015 Elsevier B.V. All rights reserved.
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