Issue 33, 2014

Fabrication of Ni–Fe2O3 magnetic nanorods and application to the detection of uric acid

Abstract

Doping of Ni into Fe2O3 lattices has been achieved by co-precipitation followed by thermal decomposition method. The structural, morphological, and magnetic properties of the fabricated samples were investigated by X-ray diffraction (XRD) analysis, X-ray photoelectron spectroscopy (XPS), Fourier transformed infrared (FT-IR) spectroscopy, UV-visible absorption (UV-vis) spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and vibrating sample magnetometry (VSM). The results reveal that the Ni is well doped within the lattices of Fe2O3. The Ni dopant suppresses the formation of more stable α-Fe2O3 at higher calcination temperature. Further, the Ni-doped Fe2O3 nanoparticles were used to fabricate an electrochemical sensor (Ni–Fe2O3/GCE) for the detection of uric acid (UA) in biological conditions by cyclic voltammetry (CV) and chronoamperometry (CA). It was found that 5%Ni–Fe2O3/GCE exhibits best response towards UA with less positive potential and larger current response. Furthermore, the sensor gives good linear current response in the concentration range of 6.6 to 112.4 μM with the higher sensitivity of 0.849 μA (μM cm2)−1. Such fabricated sensors are appropriate for newly emerging non-enzymatic electrochemical nanobiosensors.

Graphical abstract: Fabrication of Ni–Fe2O3 magnetic nanorods and application to the detection of uric acid

Supplementary files

Article information

Article type
Paper
Submitted
24 Jan 2014
Accepted
26 Mar 2014
First published
27 Mar 2014

RSC Adv., 2014,4, 17146-17155

Fabrication of Ni–Fe2O3 magnetic nanorods and application to the detection of uric acid

R. Suresh, K. Giribabu, R. Manigandan, A. Stephen and V. Narayanan, RSC Adv., 2014, 4, 17146 DOI: 10.1039/C4RA00725E

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