期刊
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
卷 36, 期 -, 页码 160-167出版社
ELSEVIER
DOI: 10.1016/j.msec.2013.12.014
关键词
Nanocomposite; Magnetic core-shell Fe3O4@SiO2 nanopartides; Multi-walled carbon nanotubes; Uric acid
资金
- post-graduate office of Guilan University
A new type of nanocomposite based on multi-walled carbon nanotubes decorated with magnetic core-shell Fe3O4@SiO2 nanoparticles (Fe3O4@SiO2/MWCNTs) was prepared and used to fabricate a modified carbon paste electrode (CPE). The nanocomposite was characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and Fourier transform infrared spectroscopy (FT-IR) techniques. Electrochemical behavior of uric acid (UA) was investigated on Fe3O4@SiO2/MWCNTs-CPE by cyclic voltammetry (CV) and square wave voltammetry (SWV) in phosphate buffer solution (pH 6.0). Under the optimized conditions, the peak currents increased linearly with the concentration of UA in the range from 0.60 to 100.0 mu M, with a detection limit of 0.13 mu M. The proposed sensor was successfully applied for the determination of UA in biological fluids. (C) 2013 Elsevier B.V. All rights reserved.
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