Voltammetric Sensor Based on Fe-doped ZnO and TiO2 Nanostructures-modified Carbon-paste Electrode for Determination of Levodopa

In this study, undoped and 1 wt.% Fe-doped with ZnO, and TiO 2 nanostructures were synthesized by a simple hydrothermal method without using templates. The influence of the Fe dopant on structural, optical and electrochemical response was studied by x-ray diffraction, scanning electron microscopy, U...

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Bibliographic Details
Published inJournal of electronic materials Vol. 46; no. 10; pp. 5657 - 5663
Main Authors Anaraki Firooz, Azam, Hosseini Nia, Bahram, Beheshtian, Javad, Ghalkhani, Masoumeh
Format Journal Article
LanguageEnglish
Published New York Springer US 01.10.2017
Springer Nature B.V
Subjects
Catalysis
Characterization and Evaluation of Materials
Chemistry and Materials Science
Dopants
Electrochemical analysis
Electrodes
Electronics and Microelectronics
Instrumentation
Iron
Materials research
Materials Science
Optical and Electronic Materials
Overvoltage
Oxidation
Photoluminescence
Reduction
Solid State Physics
Synthesis
Titanium dioxide
Titanium oxides
Voltammetry
Zinc oxide
Fe-doped
ZnO
TiO
voltammetric sensor
levodopa
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Summary:In this study, undoped and 1 wt.% Fe-doped with ZnO, and TiO 2 nanostructures were synthesized by a simple hydrothermal method without using templates. The influence of the Fe dopant on structural, optical and electrochemical response was studied by x-ray diffraction, scanning electron microscopy, UV–Vis spectra, photoluminescence spectra and electrochemical characterization system. The electrochemical response of the carbon paste electrode modified with synthesized nanostructures (undoped ZnO and TiO 2 as well as doped with Fe ions) toward levodopa (L-Dopa) was studied. Cyclic voltammetry using provided modified electrodes showed electro-catalytic properties for electro-oxidation of L-Dopa and a significant reduction was observed in the anodic overvoltage compared to the bare electrode. The results indicated the presence of the sufficient dopants. The best response was obtained in terms of the current enhancement, overvoltage reduction, and reversibility improvement of the L-Dopa oxidation reaction under experimental conditions by the modified electrode with TiO 2 nanoparticles doped with Fe ions.
ISSN:0361-5235
1543-186X
DOI:10.1007/s11664-017-5625-3