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A Zinc Oxide Carbon Nanotube Based Sensor for In Situ Monitoring of Hydrogen Peroxide in Swimming Pools
Author(s) -
Wayu Mulugeta B.,
King Julie E.,
Johnson Jacqueline A.,
Chusuei Charles C.
Publication year - 2015
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201500187
Subject(s) - chronoamperometry , hydrogen peroxide , carbon nanotube , cyclic voltammetry , electrochemical gas sensor , zinc , materials science , reproducibility , electrochemistry , oxide , inorganic chemistry , chemistry , analytical chemistry (journal) , nuclear chemistry , chemical engineering , nanotechnology , electrode , chromatography , organic chemistry , engineering
Zinc oxide nanoparticles were tethered to carbon nanotubes to form an electrochemical sensing composite, which was characterized using transmission electron microscopy, and X‐ray photoelectron and attenuated total reflectance infrared spectroscopies. The sensor′s electrocatalytic response for measuring hydrogen peroxide was investigated using cyclic voltammetry and chronoamperometry in a dynamic, well defined swimming pool environment. A wide, linear response in the concentration range of 0.025–7.0 mM at a potential of −0.360 V was shown, with rapid response time (<5 s). The sensor had excellent reproducibility, exhibited stability and selectivity, and was able to measure concentrations in a dynamic environment as they varied.