Microwave synthesis of reduced graphene oxide decorated with silver nanoparticles for electrochemical determination of 4-nitrophenol

An'amt Mohamed Noor, Perumal Rameshkumar, Norazriena Yusoff, Huang Nay Ming, Sajab Mohd Shaiful

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

A facile microwave-assisted synthesis of a reduced graphene oxide-silver (rGO-Ag) nanocomposite and its application towards the electrochemical determination of 4-nitrophenol (4-NP) are reported. The nanocomposite was characterized using UV–visible spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), Raman, and X-ray photoelectron spectroscopy (XPS). The formation of spherical AgNPs was confirmed from the single surface plasmon absorption feature and the TEM analysis. The reduction of GO was conveniently monitored using D and G band intensity ratio (ID/IG) of Raman spectrum and XPS analysis. A glassy carbon electrode (GCE) was modified with the rGO-Ag nanocomposite and used for the electrocatalytic reduction and determination of 4-NP. The nanocomposite modified electrode displayed a higher reversible redox peak currents and lower charge transfer resistance (Rct) towards [Fe(CN)6]3−/4 couple compared other controlled electrodes. The amperometric i-t curve response to 4-NP at a working potential of −0.52 V (vs. Ag/AgCl) covers the 1–1100 μM concentration range, and the limit of detection is 0.32 μM. The sensor is selective for 4-NP even in the presence of 50-fold higher concentrations of analogues such as bromophenol blue, 2-amino-4-nitrophenol, 2-chlorophenol and 2,4-dinitrophenol. The nanocomposite modified GCE was successfully applied for the determination of 4-NP in spiked real water samples where it gave recoveries between 94.3% and 100.2% at a concentration level of 10–50 μM.

Original languageEnglish
Pages (from-to)18813-18820
Number of pages8
JournalCeramics International
Volume42
Issue number16
DOIs
Publication statusPublished - 1 Dec 2016

Fingerprint

Graphite
Silver
Oxides
Graphene
Nanocomposites
Microwaves
Nanoparticles
Electrodes
Glassy carbon
Bromphenol Blue
X ray photoelectron spectroscopy
Transmission electron microscopy
2,4-Dinitrophenol
Silver oxides
Charge transfer
Raman scattering
4-nitrophenol
Nitrophenols
Recovery
X ray diffraction

Keywords

  • 4-nitrophenol
  • Electrochemical sensor
  • Graphene oxide
  • Microwave irradiation
  • Silver nanoparticles

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Microwave synthesis of reduced graphene oxide decorated with silver nanoparticles for electrochemical determination of 4-nitrophenol. / Noor, An'amt Mohamed; Rameshkumar, Perumal; Yusoff, Norazriena; Ming, Huang Nay; Mohd Shaiful, Sajab.

In: Ceramics International, Vol. 42, No. 16, 01.12.2016, p. 18813-18820.

Research output: Contribution to journalArticle

Noor, An'amt Mohamed ; Rameshkumar, Perumal ; Yusoff, Norazriena ; Ming, Huang Nay ; Mohd Shaiful, Sajab. / Microwave synthesis of reduced graphene oxide decorated with silver nanoparticles for electrochemical determination of 4-nitrophenol. In: Ceramics International. 2016 ; Vol. 42, No. 16. pp. 18813-18820.
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