Electrochemical sensors for water quality monitoring

• Grant number: 19/14418-3
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
• Start date: August 01, 2019
• End date: October 31, 2023
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Analytical Chemistry
• Principal Investigator: Mauro Bertotti
• Grantee: Gilberto Jose Silva Junior
• Host Institution: Instituto de Química (IQ). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated research grant: 18/08782-1 - Miniaturized and integrated chemical sensors: new fabrication platforms for biological, clinical and environmental applications, AP.TEM
• Associated scholarship(s): 22/09861-8 - Development of microfluidic devices using microwire electrodes for environmental pollutants detection, BE.EP.DD

Abstract

This project aims at the development of electrochemical sensors and microfluidic systems for the continuous monitoring of the concentration of chemical species in natural waters. Based on the chemical composition of the water sample and using statistical tools such PCA, information on water quality can be obtained. Particular interest will be directed to the fabrication of devices of microscopic dimensions and with short response times for the determination of nitrate, nitrite, phosphate, ammonium and dissolved oxygen. The modification of the electrode surface will be important to give special properties to the developed sensors and this will be achieved by using specific materials capable of catalyzing the electron transfer reactions of the investigated analytes to improve the sensitivity and selectivity of the proposed methods. The efficiency of these devices can be enhanced by understanding the response mechanisms in detail. Therefore, aspects associated with the composition and structure of the film modifiers and the dynamics of the electrode processes will be investigated using several electrochemical and spectroscopic tools. (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)

SILVA JUNIOR, GILBERTO J.; GUIMARAES SELVA, JESSICA SOARES; SUKERI, ANANDHAKUMAR; GONCALVES, JOSUE M.; REGIART, MATIAS; BERTOTTI, MAURO. Fabrication of dendritic nanoporous gold via a two-step amperometric approach: Application for electrochemical detection of methyl parathion in river water samples. Talanta, v. 226, MAY 2021. (19/14418-3, 18/16896-7, 18/08782-1, 19/06293-6)

KUMAR, ABHISHEK; GONCALVES, JOSUE M.; LUDER, JOHANN; NAKAMURA, MARCELO; ANGNES, LUCIO; BOUVET, MARCEL; BERTOTTI, MAURO; ARAKI, KOITI. Interplay of hetero-MN4 catalytic sites on graphene for efficient oxygen reduction reaction. Electrochimica Acta, v. 419, p. 12-pg., 2022-07-01. (17/13137-5, 19/14418-3)

REGIART, MATIAS; KUMAR, ABHISHEK; GONCALVES, JOSUE M.; SILVA JUNIOR, GILBERTO J.; MASINI, JORGE CESAR; ANGNES, LUCIO; BERTOTTI, MAURO. An Electrochemically Synthesized Nanoporous Copper Microsensor for Highly Sensitive and Selective Determination of Glyphosate. CHEMELECTROCHEM, v. 7, n. 7, p. 1558-1566, APR 1 2020. (18/16896-7, 19/14418-3, 18/08782-1, 19/06293-6)