Highly sensitive and selective dopamine determination using a photoelectrochemical sensor based on the BiVO4 and surface molecularly imprinted poly(acrylic acid-co-TRIM) on vinyl functionalized carbon nanotubes

Author(s)

Gorla, Felipe Augusto ; Ferreira, Milena do Prado ; dos Santos, Caroline Santana ; de Matos, Roberto ; Segatelli, Mariana Gava ; Tarley, Cesar Ricardo Teixeira

• Document type: Journal article
• Source: JOURNAL OF ELECTROANALYTICAL CHEMISTRY; v. 953, p. 9-pg., 2023-12-22.

Abstract

This paper describes the development of a new photoelectrochemical (PEC) sensor for dopamine (DA) deter-mination based on the nanocomposite constituted of a molecularly imprinted poly(acrylic acid -co-TRIM) func-tionalized onto MWCNT with vinyl groups (MWCNT-MIP) physically mixed with monoclinic bismuth vanadate. Synthesized polymeric materials were characterized by FT-IR, TGA, SEM and TEM. The sensor based on glassy carbon electrode modified with BiVO4/MWCNT-MIP provided a limit of detection (LOD) of 31.1 nmol/L and a linear range from 103.6 to 2500 nmol/L. The proposed sensor exhibited selectivity to DA in competitive analysis with epinephrine, norepinephrine, ascorbic acid, citric acid, uric acid, creatine and urea, and it was applied for analysis of DA in simulated urine samples using external calibration curve with accuracy attested by recovery values between 91 and 106 %. (AU)

• FAPESP's process: 14/50867-3 - INCT 2014: National Institute of Science and Technology in Bioanalysis
• Grantee: Marco Aurelio Zezzi Arruda
• Support Opportunities: Research Projects - Thematic Grants