Issue 21, 2013

Electrochemical determination of trichloroacetic acid using an ionic liquid functionalized graphene–AgPd alloy nanoparticle composite modified electrode with the enhancement effect of cetyltrimethylammonium bromide

Abstract

AgPd nanoparticles were assembled on ionic liquid-functionalized graphene by electrostatic interaction to form a graphene–metal composite. The resulting hybrid nanomaterial was characterized by transmission electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffraction and ultraviolet-visible absorption spectrophotometry. The AgPd nanoparticles were confirmed to be alloy and they were well dispersed on the ionic liquid-functionalized graphene sheets. The hybrid nanomaterial showed striking electrocatalytic activity toward the reduction of trichloroacetic acid (TCA). At the hybrid nanomaterial modified glassy carbon electrode, TCA exhibited a cathodic peak at about −0.65 V (vs. SCE) in pH 7 phosphate buffer solution, which was further enhanced by cetyltrimethylammonium bromide. Under the optimal conditions, the determination of TCA was performed with a linear range of 0.5–50 μM and a detection limit of 0.2 μM (S/N = 3).

Graphical abstract: Electrochemical determination of trichloroacetic acid using an ionic liquid functionalized graphene–AgPd alloy nanoparticle composite modified electrode with the enhancement effect of cetyltrimethylammonium bromide

Supplementary files

Article information

Article type
Paper
Submitted
30 Jul 2013
Accepted
28 Aug 2013
First published
30 Aug 2013

Anal. Methods, 2013,5, 6058-6063

Electrochemical determination of trichloroacetic acid using an ionic liquid functionalized graphene–AgPd alloy nanoparticle composite modified electrode with the enhancement effect of cetyltrimethylammonium bromide

L. Shang, F. Zhao and B. Zeng, Anal. Methods, 2013, 5, 6058 DOI: 10.1039/C3AY41286E

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