A Novel Catechol Electrochemical Sensor Based on Cobalt Hexacyanoferrate/ (CoHCF)/Au/SBA-15
Yaqian Yan, Linjing Wu, Qianqiong Guo and Shasheng Huang*
Life and Environmental Science College, Hanghai Normal University, Shanghai, PR China
- *Corresponding Author:
- Shasheng Huang
Life and Environmental Science College
Hanghai Normal University
Shanghai, 200234, PR China
E-mail: [email protected]
Received date: October 12, 2015; Accepted date: October 29, 2015; Published date: November 05, 2015
Citation: Yan Y, Wu L, Guo Q, Huang S (2015) A Novel Catechol Electrochemical Sensor Based on Cobalt Hexacyanoferrate/(CoHCF)/Au/SBA-15. J Anal Bioanal Tech 6:290. doi:10.4172/2155-9872.1000290
Copyright: © 2015 Yan Y, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
A novel electrochemical sensor for catechol was developed by electrodepositing HAuCl4 and cobalt hexacyanoferrate (CoHCF) on an ordered mesoporous SBA-15 decorated glassy carbon electrode (GCE). The CoHCF/Au/SBA-15 film was characterized by scanning electron microscopy (SEM) and impedance spectra. A mesoporous SBA-15 was used as a platform that enlarged the surface area of the working electrode. The CoHCF/ Au/SBA-15 modified electrode showed good electrocatalytic activity to catechol and the electrocatalytic response was measured using cyclic voltammetry and Amperometric i-t curve. The electrochemical performance of the sensor for catechol was further enhanced due to the deposition of Au on the electrode surface. Under the optimal conditions, the sensor showed a linear range from 3.0 × 10-7M to 5.1 × 10-5M of catechol, with a detection limit of 50 nM (S/N=3). Good reproducibility, stability and good selectivity in the presence of numerous organic phenolics made the CoHCF/ Au/SBA-15 modified electrodes applicable to the determination of catechol in the various water samples.