Application of Fe3O4@SiO2/GO nanocomposite for sensitive and selective electrochemical sensing of tryptophan

Authors

  • Hadi Beitollahi Environment Department, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman
  • Mohadeseh Safaei Department of Chemistry, Faculty of Sciences, Islamic Azad University, Yazd Branch, Yazd
  • Masoud Reza Shishehbore Department of Chemistry, Faculty of Sciences, Islamic Azad University, Yazd Branch, Yazd
  • Somayeh Tajik NanoBioElectrochemistry Center, Bam University of Medical Sciences, Bam

DOI:

https://doi.org/10.5599/jese.576

Keywords:

Tryptophan, Fe3O4@SiO2/GO nanocomposite, graphite screen printed electrodes, voltammetry

Abstract

A simple strategy for determination of tryptophan (TRP) based on Fe3O4@SiO2/GO nano­composite modified graphite screen printed electrode (Fe3O4@SiO2/GO/SPE) is re­ported. Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) were used to characterize the performance of the sensor. The Fe3O4@SiO2/GO/SPE displayed excellent electro­che­mical catalytic activities. The oxidation overpotentials of tryptophan decreased significantly and its oxidation peak current increased dramatically at Fe3O4@SiO2/GO/SPE. Under the optimized experimental conditions tryptophan showed linear response over the range of 1.0-400.0 μM. The lower detection limit was found to be 0.2 μM for tryptophan. The prac­tical application of the modified electrode was demonstrated by measuring the concen­tration of tryptophan in real samples.

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Published

08-12-2018

How to Cite

Beitollahi, H., Safaei, M., Shishehbore, M. R., & Tajik, S. (2018). Application of Fe3O4@SiO2/GO nanocomposite for sensitive and selective electrochemical sensing of tryptophan. Journal of Electrochemical Science and Engineering, 9(1), 45–53. https://doi.org/10.5599/jese.576

Issue

Section

Electrochemical Science

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