In this report, TiO2 nanotube array with multiple legs (TNML) were fabricated through electrochemical anodization route. To increase the photo-electrochemical efficiency under visible light, TNML in anatase phase were modified suitably with a pH controlled thin layer of Fe2O3 using electrode deposition method followed by anodization in an inert electrolyte. The resulting Fe2O3/TiO2 hybrid nano structure shows a 46% increase in photocurrent density than bare TNML under 1 sun illumination. The enhancement in photocurrent density was attributed to generation of electron hole pair under low energetic (higher wavelength) visible light as well due to the effective narrowed band gap in Fe2O3/TNML hybrid electrode. Moreover, the re-configured band position of individual semiconductors in the resulting hybrid electrode largely reduces the recombination rate and correspondingly increases the photocurrent density.
Journal of Materials Science: Materials in Electronics – Springer Journals
Published: Dec 14, 2017
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