Citation: Long Zhang, Yang-Ping Wen, Yuan-Yuan Yao, Zi-Fei Wang, Xue-Min Duan, Jing-Kun Xu. Electrochemical sensor based on f-SWCNT and carboxylic group functionalized PEDOT for the sensitive determination of bisphenol A[J]. Chinese Chemical Letters, ;2014, 25(4): 517-522. doi: 10.1016/j.cclet.2013.12.020 shu

Electrochemical sensor based on f-SWCNT and carboxylic group functionalized PEDOT for the sensitive determination of bisphenol A

1.
a School of Pharmacy, Jiangxi Science & Technology Normal University, Nanchang 330013, China;
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b Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang 330013, China

Corresponding author: Xue-Min Duan, Jing-Kun Xu,
Received Date: 24 October 2013
Available Online: 25 November 2013
Fund Project: The authors would like to acknowledge the financial support of this work by the NSFC (Nos. 51272096, 51263010) (Nos. 51272096, 51263010) Jiangxi Provincial Department of Education (Nos. GJJ10678, GJJ11590) (Nos. GJJ10678, GJJ11590) Natural Science Foundation of Jiangxi Province (Nos. 2010GZH0041, 20114BAB203015) (Nos. 2010GZH0041, 20114BAB203015) Jiangxi Science & Technology Normal University (No. KY2010ZY13) (No. KY2010ZY13)

A simple, sensitive, and reliable method for the voltammetric determination of bisphenol A (BPA) by using carboxylic group functionalized single-walled carbon nanotubes (f-SWCNT)/carboxylic-functionalized poly(3,4-ethylenedioxythiophene) (PC4) complex modified glassy carbon electrode (GCE) has been successfully developed. The electrochemical behavior of BPA at the surface of the modified electrode is investigated by electrochemical techniques. The cyclic voltammetry results show that the as-prepared electrode exhibits strong catalytic activity toward the oxidation of BPA with a well-defined anodic peak at 0.623 V in PBS (0.1 mol/L, pH 7.0). The surface morphology of the 3D network of composite filmis beneficial for the adsorption of analytes. Under the optimized conditions, the oxidation peak current is proportional to BPA concentration in the range between 0.099 and 5.794 μmol/L (R² = 0.9989), with a limit of detection of 0.032 μmol/L (S/N = 3). The enhanced performance of the sensor can be attributed to the excellent electrocatalytic property of f-SWCNT and the extraordinary conductivity of PC4. Furthermore, the proposed modified electrode displays high stability and good reproducibility. The good result on the voltammetric determination of BPA also indicates that the asfabricated modified electrode will be a good candidate for the electrochemical determination and analysis of BPA.
- Bisphenol A,
- Electrochemical sensor,
- Voltammetric determination,
- Poly(3,4-ethylenedioxythiophene),
- derivative
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