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Chemosensors 2015, 3(2), 146-156; doi:10.3390/chemosensors3020146

Arrays of TiO2 Nanowires as Photoelectrochemical Sensors for Hydrazine Detection

Department of Molecular Sciences and Nanosystems, University Ca’ Foscari of Venice, Santa Marta 2137, 30123 Venice, Italy
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Author to whom correspondence should be addressed.
Academic Editor: Igor Medintz
Received: 6 February 2015 / Accepted: 5 May 2015 / Published: 14 May 2015
(This article belongs to the Special Issue Electrochemical Sensors for Environmental and Food Analysis)
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Abstract

Electrodes based on arrays of TiO2 nanowires were prepared by template sol-gel synthesis with the goal of developing a hydrazine photoelectrochemical sensor. Experimental conditions were chosen so that the gelation reaction occurred inside the nanopores of track-etched polycarbonate membranes, with consequent filling with TiO2 nanowires. Different procedures for the removal of the template were examined, in order to obtain arrays of self-standing TiO2 nanowires. The nanowire arrays were bound to fluorine doped tin oxide substrates to produce handy photoelectrodes. The photocurrent recorded with the photoelectrodes in the presence of hydrazine showed significant dependence on the pollutant concentration. The development of a photoelectrochemical sensor for hydrazine detection in water samples, based on this principle, is presented. View Full-Text
Keywords: TiO2 nanowires; hydrazine; photoelectrochemical sensor; template; environmental analysis TiO2 nanowires; hydrazine; photoelectrochemical sensor; template; environmental analysis
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Ongaro, M.; Signoretto, M.; Trevisan, V.; Stortini, A.M.; Ugo, P. Arrays of TiO2 Nanowires as Photoelectrochemical Sensors for Hydrazine Detection. Chemosensors 2015, 3, 146-156.

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