Photocatalitic Performances Of Nanostructured/Hierarchised Tio2 Electrodes

PALMAS, SIMONETTA;MASCIA, MICHELE;VACCA, ANNALISA;Rizzardini S;MAIS, LAURA

2013-01-01

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Abstract

The behaviour of TiO2 based electrodes was investigated during the photoelectrocatalytic water splitting process. TiO2 Nanotubes (NT), and compact oxide (OC) structures were obtained by electrochemical oxidation of Ti foils. A subsequent hydrothermal process carried out at both the NT and OC allowed decorating the structure by TiO2 nanoparticles. The synthesized TiO2 samples worked as photoanodes both in a bulk three electrode cell and in a thin gap cell. The results from measurements of the photocurrent and from electrochemical impedance spectroscopy (EIS) were used to highlight a combined effect of the wavelength of the incident light and the kind of cell configuration, on the global performance of the systems.