Novel electrochemical sensor based on nanodiamonds and manioc starch for detection of diquat in environmental samples

Author(s)

Zambianco, Naiara Alana ^[1] ; Silva, Tiago Almeida ^{[2, 3]} ; Zanin, Hudson ^[4] ; Fatibello-Filho, Orlando ^[2] ; Janegitz, Bruno Campos ^[1]

Affiliation

^[1] Univ Fed Sao Carlos, Dept Nat Sci Math & Educ, BR-13600970 Araras, SP - Brazil

^[2] Univ Fed Sao Carlos, Dept Chem, BR-13560970 Sao Carlos, SP - Brazil

^[3] Fed Ctr Technol Educ Minas Gerais, Dept Met & Chem, BR-35180008 Timoteo, MG - Brazil

^[4] Univ Estadual Campinas, Carbon Sci Tech Labs, Sch Elect & Comp Engn, Adv Energy Storage Div, Ctr Innovat New Energies, Av Albert Einstein 400, BR-13083852 Campinas, SP - Brazil

• Document type: Journal article
• Source: DIAMOND AND RELATED MATERIALS; v. 98, OCT 2019.
• Web of Science Citations: 0

Abstract

Carbon nanomaterials thin films have been attracted considerable attention in the last years due to relative low cost and excellent electrical conductivity features. We report here on novel sensor architecture consisted of a glassy carbon surface modified with manioc starch and nanodiamonds nanoparticles. Structural and morphological properties of this thin film were investigated by Fourier-transform infrared spectroscopy, X-ray diffraction, scanning and transmission electron microscopies. By using square-wave voltammetry as electroanalytical tool, the widely used herbicide diquat (DQ) was determined in environmental samples. The modified electrode presented a linear response to DQ in the concentration range of 5.0 x 10(-7) to 4.6 x 10(-5) mol L-1 with a limit of detection of 1.1 x 10(-7) mol L-1. This novel sensor proved to be efficient to determine if DQ is present in rivers and drinking water samples. (AU)

• FAPESP's process: 17/21898-6 - New conductive devices for application in electrochemical sensing and biosensing
• Grantee: Bruno Campos Janegitz
• Support Opportunities: Regular Research Grants
• FAPESP's process: 17/11958-1 - CINE - Advanced Energy Storage Division
• Grantee: Rubens Maciel Filho
• Support Opportunities: Research Grants - Research Centers in Engineering Program
• FAPESP's process: 17/21097-3 - Bee-agriculture interactions: perspectives to sustainable use
• Grantee: Osmar Malaspina
• Support Opportunities: BIOTA-FAPESP Program - Thematic Grants
• FAPESP's process: 14/02163-7 - Development of supercapacitors devices from graphene, carbon nanotubes and diamonds
• Grantee: Hudson Giovani Zanin
• Support Opportunities: Research Grants - Young Investigators Grants