Nickel oxide Nanoparticles/Carbon Nanotubes Nanocomposite for Non-enzymatic Determination of Hydrogen Peroxide |
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| Authors: | Iñigo Fernández Soledad Carinelli José Luis González-Mora Reynaldo Villalonga Pedro A Salazar-Carballo |
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| Institution: | 1. Laboratory of Sensors, Biosensors and Advanced Materials, Faculty of Health Sciences, University of La Laguna, Campus de Ofra s/n, 38071 La Laguna, Tenerife, Spain;2. Department of Analytical Chemistry, Faculty of Chemistry, Complutense University of Madrid, 28040 Madrid, Spain |
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| Abstract: | In this work, nickel oxide nanoparticles-modified multi-walled carbon nanotubes (CNTs) were prepared and used for H2O2 sensing application. Firstly, ex situ NiO nanoparticles (NPs) were prepared and further used to decorate polyethylenimine (PEI)-modified carboxylated CNTs. The obtained nanocomposite and its precursors were identified by using X-ray diffraction, thermal analysis, Raman spectroscopy and SEM and TEM images, N2 adsorption-desorption isotherms, and electrochemical techniques. The sensing properties of the NiO-modified nanocomposite toward H2O2 were studied by electrochemical techniques using glassy carbon electrodes (GCEs) as support material. After optimizing the sensor construction, the sensor sensitivity was about of 0.83±0.01 A M?1 cm?2 with a LOD of about 1.0 μM. In addition, it showed excellent anti-interference properties, reproducibility, and stability (over 4 months). Finally, such sensors were coupled to a flow injection device and the H2O2 concentration of some commercial antiseptic solutions were successfully obtained (with recovery ratios between 96.3–102.4 %). |
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| Keywords: | non-enzymatic electrochemical sensor nickel oxide carbon nanotube nanocomposite hydrogen peroxide |
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