Electrochemical bisphenol A sensor based on N-doped graphene sheets

• Published in: Analytica chimica acta Vol. 711; pp. 24 - 28
• Main Authors: Fan, Haixia, Li, Yan, Wu, Dan, Ma, Hongmin, Mao, Kexia, Fan, Dawei, Du, Bin, Li, He, Wei, Qin
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 20.01.2012; Elsevier
• Subjects: Analytical chemistry; Benzhydryl Compounds; Biosensing Techniques - methods; Bisphenol A; Cancer; Chemistry; Chitosan - chemistry; Electrochemical methods; Electrochemical sensor; Electrochemistry; Electrodes; Endocrine disruptor; Endocrine systems; Exact sciences and technology; General, instrumentation; Graphene; Graphite - chemistry; Limit of Detection; Mathematical analysis; Microscopy, Electron, Scanning; N-doped graphene; Optimization; Phenols - analysis; Rivers - chemistry; Sensors; Water Pollutants, Chemical - analysis; Bisphenol A; Endocrine disruptor; Electrochemical sensor; N-doped graphene; Water; Electrochemical method; Sample; Use; Electron transfer; Nitrogen; Chemical sensor; Electrochemical detector; Electrocatalysis; Signal; Detection limit; Chitosan; Detection
• ISSN: 0003-2670; 1873-4324
• DOI: 10.1016/j.aca.2011.10.051

[Display omitted] ► N-doped graphene sheets have catalytic activity towards the BPA oxidation. ► The biosensor based on N-doped graphene sheets and chitosan. ► This method was proposed for determination of BPA utilizing N-doped graphene sheets. Bisphenol A (BPA), which could disrupt endocrine system and cause cancer, has been considered as an endocrine disruptor. Therefore, it is very important and necessary to develop a sensitive and selective method for detection of BPA. Herein, nitrogen-doped graphene sheets (N-GS) and chitosan (CS) were used to prepare electrochemical BPA sensor. Compared with graphene, N-GS has favorable electron transfer ability and electrocatalytic property, which could enhance the response signal towards BPA. CS also exhibits excellent film forming ability and improves the electrochemical behavior of N-GS modified electrode. The sensor exhibits a sensitive response to BPA in the range of 1.0 × 10 −8–1.3 × 10 −6 mol L −1 with a low detection limit of 5.0 × 10 −9 mol L −1 under the optimal conditions. Finally, this proposed sensor was successfully employed to determine BPA in water samples with satisfactory results.