TiO2 and TiO2/WO3 porous film electrodes for application in solar energy conversion

Haroldo G. Oliveira; Erika D. Silva; Claudia Longo

doi:10.1117/12.827774

20 August 2009 TiO₂ and TiO₂/WO₃ porous film electrodes for application in solar energy conversion

Haroldo G. Oliveira, Erika D. Silva, Claudia Longo

Proceedings Volume 7408, Solar Hydrogen and Nanotechnology IV; 74080N (2009) https://doi.org/10.1117/12.827774
Event: SPIE Solar Energy + Technology, 2009, San Diego, California, United States

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.

Citation Download Citation

Haroldo G. Oliveira, Erika D. Silva, and Claudia Longo "TiO₂ and TiO₂/WO₃ porous film electrodes for application in solar energy conversion", Proc. SPIE 7408, Solar Hydrogen and Nanotechnology IV, 74080N (20 August 2009); https://doi.org/10.1117/12.827774

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