Journal
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
Volume 204, Issue 1, Pages 69-74Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2009.02.001
Keywords
Nanocrystalline titania; Cadmium sulphide; Photoelectrochemical cell
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Funding
- Program PENED [03EDelta607]
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A two-compartment, chemically biased photoelectrochemical cell was used to photodegrade several organic substances and produce electricity and hydrogen. The photoanode of the cell was based on commercial nanocrystalline titania, which may be functionalized with CAS to absorb Visible light. The dark cathode was made also of commercial nanocrystalline titania with cast Pt nanoparticles. The cell was run under Near Ultraviolet or Visible radiation and the efficiencies in the two cases have been compared. Short chain-length alcohols and glycerol produced the highest energy yield but water-soluble waste materials are also interesting for the same purpose. The overall efficiency of cells made by CdS-functionalized titania was higher than those made Of Pure titania. However, larger Currents were obtained with pure TiO2 under Near Ultraviolet excitation. Under anaerobic conditions, molecular hydrogen can be produced at the dark cathode by the reduction of hydrogen ions generated at the photoanode. (C) 2009 Elsevier B.V. All rights reserved.
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