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

Author(s)

Santos, Anderson M. ; Feitosa, Maria H. A. ; Wong, Ademar ; Fatibello-Filho, Orlando ; Sotomayor, Maria D. P. T. ; Moraes, Fernando C.

• Document type: Journal article
• Source: SENSORS AND ACTUATORS B-CHEMICAL; v. 399, p. 10-pg., 2023-10-19.

Abstract

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 mu mol 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. (AU)

• FAPESP's process: 17/10118-0 - Study and application of electrochemical technology for the analysis and degradation of endocrine interferents: materials, sensors, processes and scientific dissemination
• Grantee: Marcos Roberto de Vasconcelos Lanza
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 20/01050-5 - Development and application of electrochemical and photoelectrochemical sensors for the determination of emerging contaminants in environmental samples
• Grantee: Orlando Fatibello Filho
• Support Opportunities: Regular Research Grants
• FAPESP's process: 22/05454-9 - Development of disposable electrochemical sensors and photoanodes manufactured with nanostructured semiconductor materials for the determination and degradation of endocrine disruptors
• Grantee: Fernando Cruz de Moraes
• Support Opportunities: Regular Research Grants
• FAPESP's process: 14/50945-4 - INCT 2014: National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactivies
• Grantee: Maria Valnice Boldrin
• Support Opportunities: Research Projects - Thematic Grants