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Highly sensitive simultaneous determination of cadmium (II), lead (II), copper (II), and mercury (II) ions on N-doped graphene modified electrode.
- Source :
-
Journal of Electroanalytical Chemistry . Jan2016, Vol. 760, p52-58. 7p. - Publication Year :
- 2016
-
Abstract
- 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 Cd 2 + , Pb 2 + , Cu 2 + , and Hg 2 + 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 Cd 2 + , Pb 2 + , Cu 2 + , and Hg 2 + due to its particular structure and unique electronic properties. Under optimal conditions, the limits of detection were estimated to be 0.05 μM for Cd 2 + and Hg 2 + , 0.005 μM for Pb 2 + and Cu 2 + , respectively. Finally, the method was applied to the simultaneous detection of trace metal ions in the tap water samples. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 15726657
- Volume :
- 760
- Database :
- Academic Search Index
- Journal :
- Journal of Electroanalytical Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 111974553
- Full Text :
- https://doi.org/10.1016/j.jelechem.2015.11.043