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Synergistic effect between hydrodynamic conditions during Ti anodization and acidic treatment on the photoelectric properties of TiO2 nanotubes.

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Title: Synergistic effect between hydrodynamic conditions during Ti anodization and acidic treatment on the photoelectric properties of TiO2 nanotubes.
Authors: Sánchez-Tovar, R.1, Fernández-Domene, R.M.1, Martínez-Sánchez, A.1, Blasco-Tamarit, E.1, García-Antón, J.1 jgarciaa@iqn.upv.es
Source: Journal of Catalysis. Oct2015, Vol. 330, p434-441. 8p.
Subjects: Titanium dioxide, Nanotubes, Hydrodynamics, Anodes, Photoelectric effect, Rutile, Scanning electron microscopy
Abstract: In the present work, the combined influence of controlled hydrodynamic conditions during Ti anodization and the acidic treatment with HClO 4 on the photoelectric properties of mixed anatase/rutile TiO 2 nanotubes has been studied. Anodized samples were analyzed by means of Field Emission Scanning Electronic Microscopy (FE-SEM), Confocal Raman Microscopy, electrochemical measurements (electrochemical impedance spectroscopy and Mott–Schottky analysis) and photoelectrochemical measurements. It has been observed that the use of hydrodynamic conditions increases the surface area of nanotubes, while acidic treatment enhances their conductivity. Besides, there is a clear synergistic effect between the hydrodynamic conditions and the acidic treatment, which results in higher photocurrent densities for the treated nanotubes formed under hydrodynamic conditions. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:In the present work, the combined influence of controlled hydrodynamic conditions during Ti anodization and the acidic treatment with HClO 4 on the photoelectric properties of mixed anatase/rutile TiO 2 nanotubes has been studied. Anodized samples were analyzed by means of Field Emission Scanning Electronic Microscopy (FE-SEM), Confocal Raman Microscopy, electrochemical measurements (electrochemical impedance spectroscopy and Mott–Schottky analysis) and photoelectrochemical measurements. It has been observed that the use of hydrodynamic conditions increases the surface area of nanotubes, while acidic treatment enhances their conductivity. Besides, there is a clear synergistic effect between the hydrodynamic conditions and the acidic treatment, which results in higher photocurrent densities for the treated nanotubes formed under hydrodynamic conditions. [ABSTRACT FROM AUTHOR]
ISSN:00219517
DOI:10.1016/j.jcat.2015.08.002