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Electrochemical Behavior and Amperometric Detection of 4‐Chlorophenol on Nano‐Au Thin Films Modified Glassy Carbon Electrode
Author(s) -
Qiu Cuicui,
Dong Xiaoqiang,
Ma Houyi,
Hou Shifeng,
Yang Jie
Publication year - 2012
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.201100662
Subject(s) - amperometry , dielectric spectroscopy , detection limit , materials science , cyclic voltammetry , glassy carbon , thin film , electrode , differential pulse voltammetry , analytical chemistry (journal) , electrochemistry , linear sweep voltammetry , voltammetry , linear range , nanotechnology , chemistry , chromatography
An amperometric sensor based on nano‐Au thin films was fabricated, by means of which a fast response to 4‐chlorophenol (4‐CP) can be achieved in the range of mM concentrations. The nanostructured Au thin film was prepared on glassy carbon electrodes by a template‐free, double‐potential step electrodeposition technique. Its structural feature can be controlled well by adjusting the deposition time. The amperometric detection of 4‐CP was performed at +0.85 V with a linear detection range from 0.2 to 4.8 mM and a detection limit of 0.11 mM ( S / N =3). Besides, the effect of concentrations on the electrochemical behavior of 4‐CP on the Au thin film was investigated by linear sweep voltammetry, differential pulse voltammetry and electrochemical impedance spectroscopy.