期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 199, 期 -, 页码 111-118出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2011.10.066
关键词
Bisphenol A; Single-walled carbon nanotubes; beta-Cyclodextrin; Electrochemistry; Modified electrode
资金
- NSFC [51072172]
- International Joint Research Program of Hunan Province [2010WK2009]
- Chinese Ministry of Education [209086]
- Hunan Provincial Education Department [08B085]
- Key Laboratory of Advanced Functional Polymeric Materials of Hunan Province [AFPM200904]
In this study, we demonstrated a highly sensitive electrochemical sensor for the determination of bisphenol A (BPA) in aqueous solution by using single-walled carbon nanotubes (SWCNTs)/beta-cyclodextrin (beta-CD) conjugate (SWCNT-CD) modified glassy carbon electrode (GCE). The cyclic voltammetry results show that the modified GCE exhibits strong catalytic activity toward the oxidation of BPA with a well-defined cyclic voltammetric peak at 0.543 V. The response current exhibits a linear range between 10.8 nM and 18.5 mu M with a high sensitivity (1256 mu A mM(-1)). The detection limit of BPA is 1.0 nM (S/N =3). The enhanced performance of the fabricated sensor can be attributed to the combination of the excellent electrocatalytic properties of SWCNTs and the molecular recognition ability of beta-CD. The sensor was successfully applied to determine BPA leached from real plastic samples with good recovery, ranging from 95% to 103%. (C) 2011 Elsevier B.V. All rights reserved.
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