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PREPARATION AND CHARACTERIZATION OF SOL–GEL-DERIVEDTiO2/ITOPHOTOELECTRODES

Author

Listed:
  • 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)

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%.

Suggested Citation

  • Chia-Hung Liang & Hung-Yi Chang & Tsz-Wei Liou & Huey-Ing Chen, 2008. "PREPARATION AND CHARACTERIZATION OF SOL–GEL-DERIVEDTiO2/ITOPHOTOELECTRODES," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 15(01n02), pages 161-168.
    • Handle: RePEc:wsi:srlxxx:v:15:y:2008:i:01n02:n:s0218625x08011159
    DOI: 10.1142/S0218625X08011159
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