Preparation and characterization of sol-gel-derived TiO2/ITO photoelectrodes

Chia Hung Liang, Hung Yi Chang, Tsz Wei Liou, Huey-Ing Chen

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2 Citations (Scopus)

Abstract

In this work, nanocrystalline TiO"2/ITO electrodes were prepared by solgel method starting from tetrabutyl orthotitanate (Ti(OBu(n))"4) reacted with hydrogen peroxide in the ice-water bath. The solgel derived TiO"2 films were characterized by XRD, SEM, BET, and UV/Vis absorption spectroscopic techniques. The preparation conditions, including the number of coats and calcination temperature, were also investigated. Furthermore, PEC cells were constructed for testing the activities of prepared TiO"2/ITO photoelectrodes. The photo-currents for hydrogen production via the PEC reaction were measured under UV irradiation (λmax = 253.7 nm). The experimental results showed that the solgel derived TiO"2 films calcined at 300°C600°C were anatase structure and they showed a maximum UV/Vis absorption at about 380 nm. Moreover, from the result of PEC reactions, it was found that the TiO"2/ITO photoelectrode (calcined at 600°C, with the thickness of TiO"2 layer of about ∼0.2 μm) demonstrated a large saturation current (0.326 mA/cm2) with a quite high photoelectrochemical conversion efficiency of 2.39%.

Original languageEnglish
Pages (from-to)161-168
Number of pages8
JournalSurface Review and Letters
Volume15
Issue number1-2
Publication statusPublished - 2008 Feb 1

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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