Functionalized graphene, quantum dots, and PEDOT:PSS based screen-printed electrode for the endocrine disruptor bisphenol A determination

• Main Author: dos Santos, Anderson M.
• Publication Date: 2024
• Other Authors: Feitosa, Maria H.A., Wong, Ademar [UNESP], Fatibello-Filho, Orlando, Sotomayor, Maria D.P.T. [UNESP], Moraes, Fernando C.
• Format: Article
• Language: eng
• Source: Repositório Institucional da UNESP
• Download full: http://dx.doi.org/10.1016/j.snb.2023.134745; https://hdl.handle.net/11449/299937
• topic: Bisphenol A; Electrochemical sensor; Graphene; Quantum dots; Screen-printed electrode

Strategies aimed for the monitoring the endocrine disruptor bisphenol A (BPA) become essential due to the high toxicity that this substance can cause in the environment. In this sense, a screen-printed electrode with functionalized graphene, cadmium telluride quantum dots, and polymer (PEDOT:PSS) was manufactured for the determination of the BPA in environmental matrices. The materials that compose the sensor were characterized by fluorescence spectroscopy, X-ray diffraction, FEG-SEM, TEM and FTIR. The electrochemical behavior of the analyte was performed by cyclic voltammetry and the quantification by square-wave voltammetry, respectively. The electroanalytical method showed a linear response in the BPA concentration range from 0.020 to 9.0 µmol L−1 with a limit of detection of 3.4 nmol L−1. Finally, the electroanalytical method was successfully applied to environmental samples for the determination of BPA, with a recovery close to 100%. This demonstrates its good applicability and sensitivity for this type of sample.