Determination of emerging contaminants employing electrochemical sensors modified with metallic nanoparticles synthesized in natural deep eutectic solvents

• Grant number: 24/13620-1
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
• Start date: December 01, 2024
• End date: November 30, 2028
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Analytical Chemistry
• Principal Investigator: Orlando Fatibello Filho
• Grantee: Gustavo Patelli Longatto
• Host Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
• Associated research grant: 24/04116-8 - Use of deep eutectic solvents in sustainable spectrophotometric and electroanalytical procedures, AP.R

Abstract

In the last five years, our research group has been evaluating the applications of deep eutectic solvents (DES), mainly in microextraction processes and in the modification of carbon paste electrodes and glassy carbon electrodes. As a subclass of DES, natural deep eutectic solvents (NADES) have emerged as more sustainable alternatives, as they are produced exclusively from natural compounds, to replace conventional organic solvents and ionic liquids, which have high toxicities and are used in numerous technological and industrial processes. Specifically, NADES have been studied for the green synthesis of metallic nanoparticles (MNPs), as these solvents are biodegradable, have thermal stability, reducing properties, and the ability to stabilize nanomaterials. In this regard, we intend to develop and optimize a synthetic route for MNPs of gold, platinum, silver, copper, and nickel, using different NADES as the reaction medium, and subsequently use them in the development of electrochemical sensors for the determination of emerging contaminants. Characterizations of NADES will be performed using infrared spectroscopy, nuclear magnetic resonance, thermogravimetric analysis, differential scanning calorimetry, viscosity measurements, conductivity, and water content. Characterizations of MNPs will be carried out using scanning and transmission electron microscopies and X-ray diffraction. The fabricated sensors will be studied using cyclic voltammetry, differential pulse voltammetry, square wave voltammetry, amperometry, and electrochemical impedance spectroscopy. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

AUGUSTO, KAREN KENLDERI DE LIMA; GOMES-JUNIOR, PAULO CARDOSO; LONGATTO, GUSTAVO PATELLI; PICCIN, EVANDRO; CAVALHEIRO, EDER TADEU GOMES; BERNALTE, ELENA; BANKS, CRAIG E.; FATIBELLO-FILHO, ORLANDO. Electrochemical sensor based on carbon nanohorns and hydrophobic deep eutectic solvent for the determination of serotonin in biological samples. Electrochimica Acta, v. 520, p. 10-pg., 2025-04-20. (24/04116-8, 24/13620-1)