Magnetite Nanorods Stabilized by Polyaniline/Reduced Graphene Oxide as a Sensing Platform for Selective and Sensitive Non‐enzymatic Hydrogen Peroxide Detection

Jane Cathleen Gabunada, Vinothkannan Mohanraj, Dong Hee Kim, Ae Rhan Kim, Dong Jin Yoo

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)

Abstract

In this study, magnetite nanorods stabilized on polyaniline/reduced graphene oxide (Fe3O4@PANI/rGO) was synthesized via a wet-reflux strategy. The possible formation of Fe3O4@PANI/rGO was morphologically and structurally verified by field emission scanning electron microscopy (FE-SEM), Fourier transform infrared (FT-IR) spectroscopy, Raman spectroscopy, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Furthermore, the thermal stability of Fe3O4@PANI/rGO was measured by a thermogravimetric analyzer (TGA); the composite had good thermal stability owing to the ceramic nature of Fe3O4. The Fe3O4@PANI/rGO has been applied as a potential sensing platform for electrochemical detection of hydrogen peroxide (H2O2). By the combined efforts of extended active surface area, active carbon support, more catalytic active sites and high electrical conductivity, the Fe3O4@PANI/rGO exhibited an improved performance toward the non-enzymatic detection of H2O2 in 0.5 M KOH with a fast response time (5 s), high sensitivity (223.7 μA mM−1 cm−2), low limit of detection (4.45 μM) and wide linear range (100 μM–1.5 mM). Furthermore, the fabricated sensor exhibited excellent recovery rates (94.2–104.0 %) during real sample analysis.
Original languageEnglish
Pages (from-to)1507-1516
Number of pages10
JournalElectroanalysis
Volume31
Issue number8
Early online date22 May 2019
DOIs
Publication statusPublished - 1 Aug 2019
Externally publishedYes

Bibliographical note

© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

Funder

Korea Institute of Energy Technology Evaluation and Planning (KETEP)
Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea. Grant Number: 20184030202210
Medical Research Center Program. Grant Number: NRF-2017R1A5A2015061
National Research Foundation (NRF)
Korean Government (MSIP)

Keywords

  • Electrochemical detection
  • Fe3O4 nanorod
  • Hydrogen peroxide
  • Polyaniline
  • Reduced graphene oxide

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