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Photoinduced degradation of organic dye over LiBiO3 under illumination of white fluorescent light

Published online by Cambridge University Press:  31 January 2011

Naoki Kikugawa ,
Liqun Yang ,
Takehiko Matsumoto  and
Jinhua Ye
Jinhua Ye*
Affiliation:
National Institute for Materials Science, 1-2-1 Sengen, Tsukuba 305-0047, Japan
*
b)This author was an editor of this focus issue during the review and decision stage. For the JMR policy on review and publication of manuscripts authored by editors, please refer to http://www.mrs.org/jmr_policy
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Abstract

We report dye-degradation effects of a semiconductor LiBiO3 revealed under illumination of a conventionally used white fluorescent light. Optical absorbance spectra of LiBiO3 were broadened so smoothly, with the absorption edge penetrated to around 730 nm, that the material was able to absorb a wide range of visible light. Results showed that solution of a standard dye, methylene blue, was degraded completely after 4 h illumination. Furthermore, the value of total organic carbon decreased 70% in the decolorized solution, suggesting that the molecular form of the original methylene blue was mineralized effectively to nonorganic fragments by the photoinduced oxidization effect. Moreover, the wavelength dependence of apparent photonic efficiency was evaluated using a standard Xe lamp coupled with monochromatic filters. These results were interpreted from the viewpoint of this material’s electronic structure.

Keywords

OxidationOxidePhotochemical
Type
Articles
Information
Journal of Materials Research , Volume 25 , Issue 1: Photocatalysis for Energy and Environmental Sustainability , January 2010 , pp. 177 - 181
Copyright
Copyright © Materials Research Society 2010

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