Pd and Ag Binary Nanoparticles Supported on Carbon Black and Tapioca for Nitrite Electrochemical Detection

Author(s)

de Freitas, Rafaela Cristina ^[1] ; Orzari, Luiz Otavio ^{[2, 1]} ; de Oliveira, Paulo Roberto ^[1] ; Janegitz, Bruno Campos ^[1]

Affiliation

^[1] Univ Fed Sao Carlos, Lab Sensors Nanomed & Nanostruct Mat, BR-13600970 Araras - Brazil

^[2] Univ Fed Sao Carlos, Dept Phys Chem & Math, BR-18052780 Sao Paulo - Brazil

• Document type: Journal article
• Source: Journal of the Electrochemical Society; v. 168, n. 11 NOV 1 2021.
• Web of Science Citations: 0

Abstract

This study reports the use of Pd and Ag bimetallic nanoparticles, supported on carbon black and tapioca for the modification of glassy carbon electrodes. The characterization of PdAg/carbon black and tapioca film on the electrode surface was performed by scanning electron microscopy, Fourier-transform infrared and electrochemical impedance spectroscopies, X-ray diffraction, and cyclic voltammetry techniques. In addition, the proposed sensor was used for the electrochemical determination of nitrite, by differential pulse voltammetry, with a linear range from 5.0 to 1000 mu mol L-1, and a detection limit of 1.24 mu mol L-1 The proposed method was applied for the detection of the analyte of interest in environmental and food samples. The bimetallic composite production is simple and the sensor proved to be sensitive for electrochemical sensing of nitrite. (C) 2021 The Electrochemical Society ({''}ECS{''}). Published on behalf of ECS by IOP Publishing Limited. (AU)

• FAPESP's process: 19/01844-4 - Development of nanostructured electrodes for determination of agrotoxic residues in honey
• Grantee: Paulo Roberto de Oliveira
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 19/23342-0 - Development of novel immunosensor architechtures for the detection of Huntington and Parkinson Diseases biomarkers
• Grantee: Luiz Otávio Orzari
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
• FAPESP's process: 19/24428-6 - Development of Pd and Ag binary materials for modification of the glassy carbon electrode and disposable printed electrode for melatonin and nitrite determination
• Grantee: Rafaela Cristina de Freitas
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• FAPESP's process: 17/21097-3 - Bee-agriculture interactions: perspectives to sustainable use
• Grantee: Osmar Malaspina
• Support Opportunities: BIOTA-FAPESP Program - Thematic Grants