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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 620Discovery of WO3/TiO2 Nanostructure Transformation...

Discovery of WO₃/TiO₂ Nanostructure Transformation by Controlling Content of NH₄F to Enhance Photoelectrochemical Response

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Abstract:

We report on the effect of the tungsten (W) cathode in controlling the morphology and properties of titanium (Ti) anodic oxide layer via an electrochemical anodization process. The content of ammonium fluoride (NH₄F) was varied in ethylene glycol (EG) electrolyte containing hydrogen peroxide (H₂O₂) in order to obtained the high ordered nanotubular structure. When amount of NH₄F was upto 5 wt%, highly ordered WO₃-TiO₂ nanotubes structure was observed. If insufficient amount of NH₄F is applied, the nanoporous structure will be favored. Highly ordered WO₃-TiO₂ nanotubes structure exhibited higher photocurrent density ( 0.9 mA/cm²) as compared to the WO₃-TiO₂ nanoporous structure.

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Periodical:

Advanced Materials Research (Volume 620)

Pages:

173-178

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.620.173

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Online since:

December 2012

Authors:

Chin Wei Lai, Srimala Sreekantan

Keywords:

Electrochemical Anodization, Photocurrent Density, WO₃-TiO₂ Nanotubes

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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