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      Morphology-tailored synthesis of tungsten trioxide (Hydrate) thin films and their photocatalytic properties

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      Author
      Jiao, Z. H.
      Wang, J. M.
      Ke, L.
      Sun, X. W.
      Demir, Hilmi Volkan
      Date
      2011-01-10
      Source Title
      ACS Applied Materials and Interfaces
      Print ISSN
      1944-8244
      Publisher
      ACS Publications
      Volume
      3
      Issue
      2
      Pages
      229 - 236
      Language
      English
      Type
      Article
      Item Usage Stats
      138
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      189
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      Abstract
      Tungsten trioxide hydrate (3WO(3)center dot H(2)O) films with different morphologies were directly grown on fluorine doped tin oxide (FTO) subsi:rate via a facile crystal-seed-assisted hydrothermal method. Scanning electron microscopy (SEM) analysis showed that 3WO(3)center dot H(2)O thin films composed of platelike, wedgelike, and sheetlike nanostructures could be selectively synthesized by adding Na(2)SO(4), (NH(4))(2)SO(4), and CH(3)COONH(4) as capping agents, respectively. X-ray diffraction (XRD) studies indicated that these films were of orthorhombic structure. The as-prepared thin films after dehydration showed obvious photcicatalytic activities. The best film grown using CH(3)COONH(4) as a capping agent generated anodic photocurrents of 1.16 mA/cm(2) fork oxidization of methanol and 0.5 mA/cm(2) for water splitting with the highest photoconversion efficiency of about 0.3% under simulated solar illumination.
      Keywords
      Tungsten trioxide
      Hydrothermal
      Capping agent
      Photocatalyst
      Water splitting
      Nanorod arrays
      Gas sensors
      Wo3
      Oxide
      Progress
      Devices
      Energy
      Cells
      Water
      Permalink
      http://hdl.handle.net/11693/12209
      Published Version (Please cite this version)
      http://dx.doi.org/10.1021/am100875z
      Collections
      • Department of Electrical and Electronics Engineering 3524
      • Department of Physics 2299
      • Institute of Materials Science and Nanotechnology (UNAM) 1775
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