Photocatalytic inactivation and removal of algae with TiO₂-coated materials

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• 作者：Tsuyoshi Ochiai ; Tomohiro Fukuda ; Kazuya Nakata ; Taketoshi Murakami ; Donald A. Tryk ; Yoshihiro Koide and Akira Fujishima
• 关键词：TiO2 photocatalyst ; Photoelectrochemical deposition ; Photocatalytic inactivation ; Algae
• 刊名：Journal of Applied Electrochemistry
• 出版年：2010
• 出版时间：October 2010
• 年：2010
• 卷：40
• 期：10
• 页码：1737-1742
• 全文大小：643.9 KB

文摘

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.