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Vol. 25 No. 6 (2013): Vol 25 Issue 6

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A Novel Electrochemical Sensor Based on Nanocomposite Film Electrode for Sensitive Determination of Environmental Hormone Bisphenol A

https://doi.org/10.14233/ajchem.2013.13560
Jun-Hua Li
Key Laboratory of Functional Organometallic Materials of Hunan Province College, Department of Chemistry and Material Science, Hengyang Normal University, Hengyang 421008, Hunan Province, P.R. China
Dai-Zhi Kuang
Key Laboratory of Functional Organometallic Materials of Hunan Province College, Department of Chemistry and Material Science, Hengyang Normal University, Hengyang 421008, Hunan Province, P.R. China
Yong-Lan Feng
Key Laboratory of Functional Organometallic Materials of Hunan Province College, Department of Chemistry and Material Science, Hengyang Normal University, Hengyang 421008, Hunan Province, P.R. China
Fu-Xing Zhang
Key Laboratory of Functional Organometallic Materials of Hunan Province College, Department of Chemistry and Material Science, Hengyang Normal University, Hengyang 421008, Hunan Province, P.R. China
Meng-Qin Liu
Key Laboratory of Functional Organometallic Materials of Hunan Province College, Department of Chemistry and Material Science, Hengyang Normal University, Hengyang 421008, Hunan Province, P.R. China

Corresponding Author(s) : Jun-Hua Li

junhua325@126.com

Asian Journal of Chemistry, Vol. 25 No. 6 (2013): Vol 25 Issue 6

Abstract

Bisphenol-A (BPA) is an emerging contaminant with severe toxic effects such as disrupting endocrine system or causing cancer, therefore, developing sensitive and selective sensor for bisphenol-A is very important and interesting. Herein, mesoporous hydroxyapatite (meso-HAP) and mesoporous titanium dioxide (meso-TiO2) have been synthesized and an electrochemical sensor for bisphenol-A was fabricated based on immobilizing meso-hydroxyapatite, meso-TiO2 and multi-walled carbon nanotubes (MWCNT) onto glassy carbon electrode (GCE) surface. Compared with bare electrode and single layer modified electrode, meso-HAP/meso-TiO2/ MWCNT modified electrode not only significantly enhanced the oxidation peak current of bisphenol-A, but also lowered the oxidation overpotential, suggesting that the prepared sensor can remarkably improve the determining sensitivity of bisphenol-A. Factors influencing the detection processes were optimized and the kinetic parameters were also investigated. Under the optimized conditions, the oxidation peak current was proportional to bisphenol-A concentration in the range from 8.0 × 10-9-4.0 × 10-7 M with the correlation coefficient of 0.9979. The detection limit was 1.0 × 10-9 M (S/N = 3). The fabricated electrode showed good reproducibility, stability and antiinterference. The proposed method was successfully applied to determine bisphenol-A in plastic products and the results were satisfactory.

Keywords

Bisphenol-A Electrochemical sensor Hydroxyapatite Titanium dioxide Determination
Li, J.-H., Kuang, D.-Z., Feng, Y.-L., Zhang, F.-X., & Liu, M.-Q. (2013). A Novel Electrochemical Sensor Based on Nanocomposite Film Electrode for Sensitive Determination of Environmental Hormone Bisphenol A. Asian Journal of Chemistry, 25(6), 3147–3153. https://doi.org/10.14233/ajchem.2013.13560
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