Issue 29, 2020

A dopamine electrochemical sensor based on a platinum–silver graphene nanocomposite modified electrode

Abstract

A platinum–silver graphene (Pt–Ag/Gr) nanocomposite modified electrode was fabricated for the electrochemical detection of dopamine (DA). Electrochemical studies of the Pt–Ag/Gr nanocomposite towards DA detection were performed by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The CV analysis showed that Pt–Ag/Gr/GCE had enhanced electrocatalytic activity towards DA oxidation due to the synergistic effects between the platinum–silver nanoparticles and graphene. The DPV results showed that the modified sensor demonstrated a linear concentration range between 0.1 and 60 μM with a limit of detection of 0.012 μM. The Pt–Ag/Gr/GCE presented satisfactory results for reproducibility, stability and selectivity. The prepared sensor also showed acceptable recoveries for a real sample study.

Graphical abstract: A dopamine electrochemical sensor based on a platinum–silver graphene nanocomposite modified electrode

Supplementary files

Article information

Article type
Paper
Submitted
31 12 2019
Accepted
19 4 2020
First published
05 5 2020
This article is Open Access
Creative Commons BY license

RSC Adv., 2020,10, 17336-17344

A dopamine electrochemical sensor based on a platinum–silver graphene nanocomposite modified electrode

N. S. Anuar, W. J. Basirun, Md. Shalauddin and S. Akhter, RSC Adv., 2020, 10, 17336 DOI: 10.1039/C9RA11056A

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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