A novel hydrazine electrochemical sensor based on a carbon nanotube-wired ZnO nanoflower-modified electrode

ZnO nanoflowers were synthesized by a simple process (ammonia-evaporation-induced synthetic method) and were applied to the hydrazine electrochemical sensor. The prepared material was characterized by means of scanning electron microscopy (SEM) and X-ray powder diffraction (XRD) and was then immobil...

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Bibliographic Details
Published in:Electrochimica acta 2009-12, Vol.55 (1), p.178-182
Main Authors: Fang, Bin, Zhang, Cuihong, Zhang, Wei, Wang, Guangfeng
Format: Article
Language:English
Subjects:
Analytical chemistry
Chemistry
Electrocatalysis
Electrochemical methods
Electrochemistry
Electrodes: preparations and properties
Exact sciences and technology
General and physical chemistry
Hydrazine
Modified electrode
MWCNTs
Other electrodes
ZnO
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Summary:ZnO nanoflowers were synthesized by a simple process (ammonia-evaporation-induced synthetic method) and were applied to the hydrazine electrochemical sensor. The prepared material was characterized by means of scanning electron microscopy (SEM) and X-ray powder diffraction (XRD) and was then immobilized onto the surface of a glassy carbon electrode (GCE) via multi-walled carbon nanotubes (MWCNTs) to obtain ZnO/MWCNTs/GCE. The potential utility of the constructed electrodes was demonstrated by applying them to the analytical determination of hydrazine concentration. An optimized limit of detection of 0.18 μM was obtained at a signal-to-noise ratio of 3 and with a fast response time (within 3 s). Additionally, the ZnO/MWCNTs/GCE exhibited a wide linear range from 0.6 to 250 μM and higher sensitivity for hydrazine than did the ZnO modified electrode without immobilization of MWCNTs.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2009.08.036