Loading…
Decoration of graphene nano platelets with gold nanoparticles for voltammetry of 4-nonylphenol
To decorate graphene nano platelets (GNPs) with uniform, non-aggregated, and well-distributed gold nanoparticles (Au NPs) as well as to improve the stability of GNPs on the electrode surface, a one step in situ co-electrodeposition procedure has been developed using a mixture of sol-gel, β-cyclodext...
Saved in:
Published in: | Carbon (New York) 2017-06, Vol.117, p.313-321 |
---|---|
Main Authors: | , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Summary: | To decorate graphene nano platelets (GNPs) with uniform, non-aggregated, and well-distributed gold nanoparticles (Au NPs) as well as to improve the stability of GNPs on the electrode surface, a one step in situ co-electrodeposition procedure has been developed using a mixture of sol-gel, β-cyclodextrin (β-CD), and the gold precursor of HAuCl4. The in situ co-electrodeposited Au NPs have been characterized using scanning electron microscope and transmission electron microscope. Based on the composite of sol-gel, β-CD, Au NPs, and GNPs, a modified electrode has been constructed. After its characterization using voltammetry and impedance, voltammetry of 4-nonylphenol has been investigated on such an electrode, revealing an irreversible, adsorption-controlled, one-electron-and-one-proton involved oxidation process. The oxidation peak current is much enhanced. This enhancement is interpreted as a synergistic effect among GNPs, Au NPs, sol-gel, and β-CD. Using this electrode, a wide linear range (0.01–1.0 μM) and a low detection limit (down to 3.0 nM) for the monitoring of 4-nonylphenol have been achieved. Such a stable electrode is therefore promising for the reproducible and sensitive monitoring of 4-nonylphenol in the environment.
[Display omitted] |
---|---|
ISSN: | 0008-6223 1873-3891 |
DOI: | 10.1016/j.carbon.2017.02.103 |