Photodegradation of Methylene Blue Aqueous Solution Sensitized by Pyrochlore-Related κ-CeZrO4 Oxide Powder

Takahisa Omata; Kousuke Ono; Shinya Otsuka-Yao-Matsuo

doi:10.2320/matertrans.44.1620

Photodegradation of Methylene Blue Aqueous Solution Sensitized by Pyrochlore-Related κ-CeZrO₄ Oxide Powder

Takahisa Omata, Kousuke Ono, Shinya Otsuka-Yao-Matsuo

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Keywords: photodegradation, methylene blue, photocatalytic reaction, pyrochlore-related, ceria, zirconia

JOURNAL FREE ACCESS

2003 Volume 44 Issue 8 Pages 1620-1623

DOI https://doi.org/10.2320/matertrans.44.1620

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Abstract

The photocatalytic degradation of methylene blue aqueous solution sensitized by a pyrochlore-related κ-CeZrO₄ phase was investigated under irradiation with Xe discharge light. The optical absorbance of the solution was first decreased smoothly, and then retention was observed in several hours due to the formation of a new absorption peak. The absorbance spectrum resembled that of thionine. The present study confirms that the photocatalytic reaction sensitized by κ-CeZrO₄ was different from that by TiO₂.

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