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Proceedings Paper

TiO2 and TiO2/WO3 porous film electrodes for application in solar energy conversion
Author(s): Haroldo G. Oliveira; Erika D. Silva; Claudia Longo
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Paper Abstract

TiO2 and TiO2/WO3 porous films were deposited onto transparent conducting glass electrodes, resulting in uniform films consisted of agglomerated particles with average diameters ranging from 50 to 200 nm; Ti, O and W atoms were homogeneously distributed at the surface of hybrid film. Comparable electrochemical properties were observed in the dark, with small capacitive currents and similar potentials for O2 and H2 evolution reactions in aqueous solution. Under polychromatic irradiation, the hybrid film electrode, molar ratio WO3/TiO2 = 12 %, reveled higher photocurrent and photocatalytic activity for oxidation of phenol and 17-α-ethinylestradiol. The visible light harvesting ability of hybrid film, with band gap energy estimated as 2.3 eV, and the relative position of conduction and valence band edges that inhibits charge recombination, should improve its photocatalytic activity for organic pollutant removal.

Paper Details

Date Published: 20 August 2009
PDF: 6 pages
Proc. SPIE 7408, Solar Hydrogen and Nanotechnology IV, 74080N (20 August 2009); doi: 10.1117/12.827774
Show Author Affiliations
Haroldo G. Oliveira, State Univ. of Campinas (Brazil)
Erika D. Silva, State Univ. of Campinas (Brazil)
Claudia Longo, State Univ. of Campinas (Brazil)

Published in SPIE Proceedings Vol. 7408:
Solar Hydrogen and Nanotechnology IV
Frank E. Osterloh, Editor(s)

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