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 Dec. 2019
Accepted
19 Apr. 2020
First published
05 Maijs 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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