Influence of MnO2 on the Photocatalytic Activity of TiO2 Under Different UV Sources

Chem. J. Chinese Universities

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Influence of MnO₂ on the Photocatalytic Activity of TiO₂ Under Different UV Sources

GONG Ya-Min¹, MA Zi-Chuan^1,2*, LI Shun-Jun¹, ZHANG Jie¹, LIU Jing-Ze^2*

1. College of Chemistry and Material Sciences,
2. College of Life Science, Hebei Normal University, Shijiazhuang 050016, China

Received:2008-05-12 Revised:1900-01-01 Online:2008-11-10 Published:2008-11-10
Contact: MA Zi-Chuan,LIU Jing-Ze

Abstract

Abstract: The influences of MnO₂ particles on the photocatalytic activity of Degussa P-25 TiO₂ were investigated with kinetical method under three kinds of UV sources, which are UV365/28 W, UV302/16 W and UV254/25 W. α-MnO₂, β-MnO₂ and δ-MnO₂ were introduced in the experiment. The results show that TiO₂ photocatalyst deactivates due to the presence of MnO₂ particles under UV365/28 W and UV302/16 W, while the photocatalytic activity of TiO₂ basically keeps stable photocatalysis activity under UV254/25 W. In conclusion, the stability of TiO₂ photocatalyst is significantly related to the wavelength of UV sources.

Key words: TiO₂, MnO₂, Deactivation, Photocatalysis

CLC Number:

O643.32

TrendMD:

GONG Ya-Min¹, MA Zi-Chuan^1,2*, LI Shun-Jun¹, ZHANG Jie¹, LIU Jing-Ze^2*. Influence of MnO₂ on the Photocatalytic Activity of TiO₂ Under Different UV Sources[J]. Chem. J. Chinese Universities, doi: .

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Influence of MnO₂ on the Photocatalytic Activity of TiO₂ Under Different UV Sources

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