Pen sensor made with silver nanoparticles decorating graphite-polyurethane electrodes to detect bisphenol-A in tap and river water samples

Author(s)

Baccarin, Marina ; Ciciliati, Mariani A. ; Oliveira, Osvaldo N. ; Cavalheiro, Eder T. G. ; Raymundo-Pereira, Paulo A.

• Document type: Journal article
• Source: Materials Science & Engineering C-Materials for Biological Applications; v. 114, p. 8-pg., 2020-09-01.

Abstract

Rapid, on-site detection of emerging pollutants is critical for monitoring health threats and the environment, especially if performed through autonomous systems. In this paper, we report on a new design of a complete electrochemical system whose working (WE), auxiliary (AE) and reference (RE) electrodes were obtained on a pen (PEN Sensor) made with graphite:polyurethane (GPUE). Working electrodes were decorated with spherical, ca. 200 nm silver nanoparticles (AgNPs) reduced on graphite using the polyol method. Differential pulse voltammetry (DPV) was used to detect bisphenol-A (BPA) in a linear range from 2.5 to 15 mu mo L-1 with detection limit of 0.24 mu moL L (-1). The PEN Sensor could also detect bisphenol-A in tap and river water samples, with satisfactory reproducibility and repeatability, while common interferents did not affect electrooxidation of bisphenol-A. The high sensitivity and rapid detection are suitable for real-time analysis and in loco monitoring of emerging pollutants. With their robustness and versatility, PEN Sensors such as those fabricated here may be integrated into futuristic smart robotic systems. (AU)

• FAPESP's process: 13/14262-7 - Nanostructured films from biologically-relevant materials
• Grantee: Osvaldo Novais de Oliveira Junior
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 16/01919-6 - Design and fabrication of nanostructured flexible devices for biomarkers detection
• Grantee: Paulo Augusto Raymundo Pereira
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 17/04211-7 - Development of inks based on metalic nanoparticles and polymers for the preparation of conventional and printed electrodes
• Grantee: Éder Tadeu Gomes Cavalheiro
• Support Opportunities: Regular Research Grants