Issue 11, 2019

A sensitive electrochemical sensor based on reduced graphene oxide/Fe3O4 nanorod composites for detection of nitrofurantoin and its metabolite

Abstract

In this work, a reduced graphene oxide/Fe3O4 nanorod composite (rGO/Fe3O4NR) modified glassy carbon electrode was fabricated for nitrofurantoin (NFT) and 1-aminohydantoin (AHD) detection. The structure of the synthesized nanocomposites was confirmed by transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD). We synthesized rGO/Fe3O4NR composites with the advantages of larger specific surface area, more active sites, and higher conductivity than those of a single material. Meanwhile, they exhibited higher catalytic activity and efficiently accelerated electron transfer, thereby greatly enhancing the electrode’s performance. Under optimal conditions, the modified electrode exhibited a linear relationship in the NFT concentration range from 0.005 to 100 μmol L−1 with a detection limit of 1.14 nmol L−1. The linear range of AHD was 0.1 to 100 μmol L−1 with a detection limit of 83.1 nmol L−1. The recoveries of NFT and AHD were 91.10–94.07% and 92.93–97.94%, respectively. In addition, the proposed electrode displayed an excellent analytical performance with great reproducibility, stability and anti-interference ability. It was successfully utilized for the determination of NFT and AHD in real samples.

Graphical abstract: A sensitive electrochemical sensor based on reduced graphene oxide/Fe3O4 nanorod composites for detection of nitrofurantoin and its metabolite

Article information

Article type
Paper
Submitted
25 jan 2019
Accepted
10 feb 2019
First published
15 feb 2019

Anal. Methods, 2019,11, 1427-1435

A sensitive electrochemical sensor based on reduced graphene oxide/Fe3O4 nanorod composites for detection of nitrofurantoin and its metabolite

B. He and J. Li, Anal. Methods, 2019, 11, 1427 DOI: 10.1039/C9AY00197B

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