Photoelectrochemical characterization of nanocrystallineTiO2 films on titanium substrates

FABIANA Y. OLIVA; LUCÍA B. AVALLE; ELIZABETH SANTOS; OSVALDO R. CÁMARA

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY

Elsevier

Año: 2002 vol. 146 p. 175 - 175

1010-6030

font face="Times New Roman" size="1"> This paper deals with the photo-electrochemical characterization of nanocrystalline TiO2 films deposited on titanium substrates in 0.1M NaCl solutions. These films were confirmed to contain mainly anatase crystallites by X-ray diffraction (XRD) and have n-type properties by UV-photoelectron spectroscopy (UPS). Experiments were also performed on thermal and electrochemical TiO2 oxides formed in air or the same electrolyte, respectively, to delineate the role in the electrochemical behavior of the nanocrystalline films and differentiate their properties from the titanium substrate and its spontaneously formed oxide. Systematic enhancement of the photocurrent was observed for