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Photocatalytic inactivation and removal of algae with TiO2-coated materials

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Abstract

The capabilities of TiO2-coated materials for the inactivation and removal of algae were investigated. As supports for TiO2, non-woven fabric and Ni foam were chosen. To evaluate the ability of noble metal cocatalyst additions to facilitate the photocatalytic algal inhibition of TiO2-coated materials, Pd nanoparticles were deposited on non-woven fabric-supported TiO2 by photoelectrochemical deposition. The fabric-supported Pd/TiO2 showed higher inhibition activity for algal growth compared to the fabric-supported TiO2 without Pd. In addition, Ni foam-supported TiO2 also showed high inhibition activity, both in laboratory-scale tests and open-air tests. Therefore, TiO2-coated materials with suitable coating methods such as the use of cocatalysts or large surface area can substantially inhibit algal growth. The ability of the TiO2-coated materials to inhibit algae correlated well with their activity for the photocatalytic decolorization of methylene blue, suggesting a nonspecific mechanism in the breakdown of cellular structures.

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Acknowledgments

The authors are grateful to Ms. Y. Matsubayashi (Japan Vilene Co., Ltd.) for preparing the non-woven fabric-supported TiO2 and for her helpful advice and discussion of these experiments. And, the authors are also grateful to Mr. H. Masumitsu (Keyence Corporation) for assistance with the digital microscope.

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Authors and Affiliations

  1. Kanagawa Academy of Science and Technology, 3-2-1 Sakado, Takatsu-ku, Kawasaki, Kanagawa, 213-0012, Japan

    Tsuyoshi Ochiai, Tomohiro Fukuda, Kazuya Nakata, Taketoshi Murakami & Akira Fujishima

  2. Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Yokohama, Kanagawa, 221-8686, Japan

    Tomohiro Fukuda & Yoshihiro Koide

  3. Fuel Cell Nanomaterials Center, University of Yamanashi, 6-43 Miyamae-cho, Kofu, Yamanashi, 400-0021, Japan

    Donald A. Tryk

Authors
  1. Tsuyoshi Ochiai
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  2. Tomohiro Fukuda
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  3. Kazuya Nakata
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  4. Taketoshi Murakami
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  5. Donald A. Tryk
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  6. Yoshihiro Koide
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  7. Akira Fujishima
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Correspondence to Akira Fujishima.

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Ochiai, T., Fukuda, T., Nakata, K. et al. Photocatalytic inactivation and removal of algae with TiO2-coated materials. J Appl Electrochem 40, 1737–1742 (2010). https://doi.org/10.1007/s10800-010-0133-7

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  • DOI: https://doi.org/10.1007/s10800-010-0133-7

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