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Selective Determination of Copper (II) Based on Aluminum Silicon Carbide Nanoparticles Modified Glassy Carbon Electrode by Square Wave Stripping Voltammetry
Author(s) -
Wu Y. L.,
Bai F.,
Yang T.,
Chen J. H.,
Su L.,
Hou X. M.
Publication year - 2017
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201700122
Subject(s) - materials science , analytical chemistry (journal) , stripping (fiber) , cyclic voltammetry , scanning electron microscope , anodic stripping voltammetry , dielectric spectroscopy , copper , glassy carbon , electrode , electrochemistry , nanoparticle , chemistry , nanotechnology , metallurgy , composite material , chromatography
The morphology and structure of as‐prepared aluminum silicon carbide (Al 4 SiC 4 ) were characterized using X‐ray diffraction (XRD) patterns, scanning electron microscope (SEM), transmission electron microscopy (TEM) and UV‐vis spectra. The Al 4 SiC 4 nanoparticles modified glassy carbon electrode (GCE) was further investigated by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Based on this, this kind of new electrode was used for the detection of trace Cu 2+ by square wave anodic stripping voltammetry (SWASV) for the first time. The electrochemical parameters influencing on deposition and stripping of metal ions, such as supporting electrolytes, pH value, deposition potential and deposition time, were also optimized. The results showed that the Al 4 SiC 4 modified GCE exhibited excellent stripping response of Cu 2+ and the stripping peaks response increased linearly with increasing concentration of Cu 2+ in the ranges of 400 to 2200 nM. Under the optimized conditions the favorable sensitivity of the Al 4 SiC 4 modified GCE toward trace Cu 2+ was 1.49 μA μM −1 and the limit of detection (S/N=3) was estimated to be 2.76 nM. More importantly, Al 4 SiC 4 modified GCE had an excellent stability and negligible interference from other coexisting metal ions in the electrochemical determination of Cu 2+ .