PREPARATION AND CHARACTERIZATION OF SOL–GEL-DERIVEDTiO2/ITOPHOTOELECTRODES

Chia-Hung Liang, Hung-Yi Chang, Tsz-Wei Liou and Huey-Ing Chen ()
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Chia-Hung Liang: Department of Chemical Engineering, National Cheng Kung University, 1, University Road, Tainan 70101, Taiwan
Hung-Yi Chang: Department of Chemical Engineering, National Cheng Kung University, 1, University Road, Tainan 70101, Taiwan
Tsz-Wei Liou: Department of Chemical Engineering, National Cheng Kung University, 1, University Road, Tainan 70101, Taiwan
Huey-Ing Chen: Department of Chemical Engineering, National Cheng Kung University, 1, University Road, Tainan 70101, Taiwan

Surface Review and Letters (SRL), 2008, vol. 15, issue 01n02, 161-168

Abstract: In this work, nanocrystallineTiO2/ITOelectrodes were prepared by sol–gel method starting from tetrabutyl orthotitanate(Ti(OBun)4)reacted with hydrogen peroxide in the ice-water bath. The sol–gel derivedTiO2films 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 preparedTiO2/ITOphotoelectrodes. The photo-currents for hydrogen production via the PEC reaction were measured under UV irradiation(λmax= 253.7nm). The experimental results showed that the sol–gel derivedTiO2films calcined at 300°C–600°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 theTiO2/ITOphotoelectrode (calcined at 600°C, with the thickness ofTiO2layer of about ~0.2 μm) demonstrated a large saturation current (0.326 mA/cm2) with a quite high photoelectrochemical conversion efficiency of 2.39%.

Keywords: Titanium dioxide; TiO2; sol–gel; photoelectrochemical; photoelectrode (search for similar items in EconPapers)
Date: 2008
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DOI: 10.1142/S0218625X08011159

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