Jump to main content
Jump to site search


Gold nanoparticle-doped three-dimensional reduced graphene hydrogel modified electrodes for amperometric determination of indole-3-acetic acid and salicylic acid

Author affiliations

Abstract

Three-dimensional (3D) networked nanomaterials have attracted great interest because of their unique porous and 3D-networked structures. In this work, a series of gold nanoparticle (AuNP) doped graphene hydrogel nanocomposites (AuNP-GHs) were synthesized through hydrothermal reaction under various conditions. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) were used to characterize the AuNP-GH. The AuNP-GH was used to modify the glassy carbon electrode (GCE) for the detection of indole-3-acetic acid (IAA) and salicylic acid (SA) using chronoamperometric measurements. Under optimum conditions, the AuNP-GH/GCE exhibited linear response to IAA in the ranges of 0.8–4 μM and 4–128 μM, and to SA in the ranges of 0.8–8.4 μM and 8.4–188.4 μM. The detection limits (S/N = 3) were calculated to be 0.21 μM for IAA and 0.22 μM for SA. The proposed sensor showed good sensitivity and stability and hence it was applied in the detection of IAA and SA in spiked samples with satisfactory results.

Graphical abstract: Gold nanoparticle-doped three-dimensional reduced graphene hydrogel modified electrodes for amperometric determination of indole-3-acetic acid and salicylic acid

  • This article is part of the themed collection: Nanocarbons
Back to tab navigation

Supplementary files

Publication details

The article was received on 12 Feb 2019, accepted on 28 Apr 2019 and first published on 29 Apr 2019


Article type: Paper
DOI: 10.1039/C9NR01309A
Nanoscale, 2019, Advance Article

  •   Request permissions

    Gold nanoparticle-doped three-dimensional reduced graphene hydrogel modified electrodes for amperometric determination of indole-3-acetic acid and salicylic acid

    X. Cao, X. Zhu, S. He, X. Xu, Y. Ye and S. Gunasekaran, Nanoscale, 2019, Advance Article , DOI: 10.1039/C9NR01309A

Search articles by author

Spotlight

Advertisements