Issue 6, 2018

Pyrolytic preparation of gold nanoparticle-coated taro carbon and its application for the selective detection of dopamine

Abstract

A highly selective and sensitive electrochemical method was developed for the detection of dopamine (DA), based on a gold nanoparticle (AuNP)-coated taro carbon (TC)-modified glassy carbon electrode (AuNP-TC/GCE). This novel AuNP-TC material was simply prepared by carrying out a pyrolysis of a composite material obtained by treatment of an acid-treated taro stem powder with HAuCl4. Transmission electron microscopy (TEM), Raman spectroscopy, field-emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD) were employed to characterize the AuNP-TC material. Electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) were used to characterize the modified electrode. The modified GCE exhibited a well-defined current response only toward the electrochemical oxidation of DA in a mixture solution of ascorbic acid (AA), DA, and uric acid (UA). This designed electrochemical sensor showed a linear response in the concentration range of 0.5 μM to 250 μM DA and a sensing limit (S/N = 3) of 0.25 μM was found. The sensor was also able to successfully detect DA in a dopamine hydrochloride injection (DAI). Moreover, the sensor exhibited excellent stability and reproducibility.

Graphical abstract: Pyrolytic preparation of gold nanoparticle-coated taro carbon and its application for the selective detection of dopamine

Article information

Article type
Paper
Submitted
06 Dec 2017
Accepted
08 Feb 2018
First published
08 Feb 2018

New J. Chem., 2018,42, 4543-4552

Pyrolytic preparation of gold nanoparticle-coated taro carbon and its application for the selective detection of dopamine

A. J. S. Ahammad, Md. M. Hasan, T. Islam, M. O. Al-Shehri, A. N. Anju, Md. K. Alam, J. Kim, M. A. A. Qasem and Md. A. Aziz, New J. Chem., 2018, 42, 4543 DOI: 10.1039/C7NJ04777K

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