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Photocatalytic Decomposition of Water on Double-Layered Visible Light-Responsive TiO2 Thin Films Prepared by a Magnetron Sputtering Deposition Method

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Abstract

A radio-frequency magnetron sputtering (RF-MS) deposition method was applied to prepare a unique double-layered visible light-responsive TiO2 thin film photocatalyst on a Ti foil substrate (DL-TiO2/Ti). The DL-TiO2/Ti consists of a UV light-responsive TiO2 thin film (UV-TiO2) deposited as the inner block layer on a Ti foil substrate and a visible light-responsive TiO2 thin film (Vis-TiO2) deposited as the outer layer. DL-TiO2/Ti exhibited higher photoelectrochemical and photocatalytic performance under both UV and visible light irradiation than a single-layered Vis-TiO2 thin film photocatalyst deposited on a Ti foil substrate. The optimal thickness of the UV-TiO2 film as the inner block layer of DL-TiO2/Ti was found be 100 nm in terms of the photoelectrochemical and photocatalytic performance. Expanding on this work, a novel double-layered TiO2 thin film device, DL-TiO2/Ti/Pt, was also prepared by the RF-MS method where DL-TiO2 was deposited on one side of a Ti foil substrate and Pt was deposited on the other side. The separate evolution of H2 and O2 from H2O was successfully achieved by using an H-type glass cell consisting of two aqueous phases separated by the DL-TiO2/Ti/Pt and a proton-exchange membrane. The separate evolution rate of H2 and O2 was found to be dramatically enhanced on DL-TiO2/Ti/Pt as compared with a single-layered Vis-TiO2 thin film device under white light irradiation from a solar simulator.

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Authors and Affiliations

  1. Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka, 599-8531, Japan

    Ryohei Tode, Afshin Ebrahimi, Shohei Fukumoto, Kazushi Iyatani, Masato Takeuchi, Masaya Matsuoka & Masakazu Anpo

  2. Taiwan Textile Research Institute (TTRI), No. 6, Chen-Tian, Rd., Tu-Chen City, Taipei County, 236, Taiwan

    Chia Hui Lee & Chi-Sheng Jiang

Authors
  1. Ryohei Tode
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  2. Afshin Ebrahimi
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  3. Shohei Fukumoto
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  4. Kazushi Iyatani
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  5. Masato Takeuchi
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  6. Masaya Matsuoka
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  7. Chia Hui Lee
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  8. Chi-Sheng Jiang
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  9. Masakazu Anpo
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Correspondence to Masakazu Anpo.

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Tode, R., Ebrahimi, A., Fukumoto, S. et al. Photocatalytic Decomposition of Water on Double-Layered Visible Light-Responsive TiO2 Thin Films Prepared by a Magnetron Sputtering Deposition Method. Catal Lett 135, 10–15 (2010). https://doi.org/10.1007/s10562-010-0262-y

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  • DOI: https://doi.org/10.1007/s10562-010-0262-y

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