Printex 6L Carbon Nanoballs used in Electrochemical Sensors for Simultaneous Detection of Emerging Pollutants Hydroquinone and Paracetamol

Author(s)

Raymundo-Pereira, Paulo A. ; Campos, Anderson M. ; Mendonca, Camila D. ; Calegaro, Marcelo L. ; Machado, Sergio A. S. ; Oliveira, Jr., Osvaldo N.

• Document type: Journal article
• Source: SENSORS AND ACTUATORS B-CHEMICAL; v. 252, p. 165-174, NOV 2017.
• Web of Science Citations: 25

Abstract

We report the use of Printex 6L Carbon nanoballs (CNB) as electrode material for electrochemical detection of hydroquinone (HQ) and paracetamol (PARA). Nanoballs with diameters between 20 and 25 nm are amorphous, impurity-free according to energy-dispersive X-ray spectroscopy, and formed homogeneous films on glassy carbon (GC) electrodes. Their conductive behavior was confirmed with cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS), which could be exploited in differential pulse voltammetry (DPV) to detect HQ and PARA at low overpotential (67 and 341 mV vs. Ag/AgCl for HQ and PARA, respectively) between 8.0 x 10(-8) and 2.3 x 10(-4) mol L-1. The limit of detection for these GC/CNB sensors was 13.0 and 8.0 x 10(-9) mol L-1 for HQ and PARA, respectively, being competitive with other devices made with carbonaceous materials. In spite of their simplicity, the sensors were also stable, reproducible and robust against typical interferents in biological fluids such as nitrite, sulfite, the antibiotic amoxicillin, sodium dodecyl sulfate (SDS) and humic substances. Experiments with natural waters from a creek indicated that electrochemical sensing of HQ and PARA with GC/CNB is as efficient as standard chromatography. Because CNB are much simpler and cheaper to produce than other carbon materials, e.g. graphene and nanotubes, their use may be advantageous in other electroanalytical applications. (C) 2017 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 13/14262-7 - Nanostructured films from biologically-relevant materials
• Grantee: Osvaldo Novais de Oliveira Junior
• Support type: 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 type: Scholarships in Brazil - Post-Doctorate
• FAPESP's process: 14/05197-0 - Development of electrochemical sensors based in mesoporous sílica containing graphene for analysis of bisphenol A
• Grantee: Anderson Massahiro de Campos
• Support type: Scholarships in Brazil - Scientific Initiation
• FAPESP's process: 16/12759-0 - Development of an advanced electroanalytical methodology for quantification of the hormones 17²-estradiol and 17±-etinilestradiol in supply water samples using electrodes modified with graphene, gold nanoparticles and quantum dots
• Grantee: Sergio Antonio Spinola Machado
• Support type: Regular Research Grants
• FAPESP's process: 12/17689-9 - Preparation and characterization of bifunctional-nanostructured surfaces of Au-Pt obtained via templates for application in sensors and biosensors
• Grantee: Paulo Augusto Raymundo Pereira
• Support type: Scholarships in Brazil - Doctorate