Selenium-Modified TiO2 and Its Impact on Photocatalysis

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2010-11-12
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Rockafellow, Erin
Haywood, Jessica
Witte, Travis
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Houk, Robert
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Jenks, William
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Chemistry

The Department of Chemistry seeks to provide students with a foundation in the fundamentals and application of chemical theories and processes of the lab. Thus prepared they me pursue careers as teachers, industry supervisors, or research chemists in a variety of domains (governmental, academic, etc).

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The Department of Chemistry was founded in 1880.

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Abstract

This work describes the preparation of a selenium-modified TiO2 photocatalyst and a preliminary evaluation of its photocatalytic activity. Se-TiO2 displayed greater visible absorption than undoped TiO2 and was still capable of degrading quinoline at a slightly faster rate than undoped TiO2 under UV light. Se-TiO2 was also able to degrade organic molecules under purely visible light by a single electron transfer pathway. Irradiation with >435 nm light showed no evidence of efficient production of HO•-like species. Se-TiO2 was also examined under hypoxic conditions, where the Se atoms were capable of trapping photogenerated electrons as evidenced by XPS.

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Reprinted (adapted) with permission from Langmuir, 26(24); 19052-19059. Doi: 10.1021/la1026569. Copyright 2010 American Chemical Society.

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Fri Jan 01 00:00:00 UTC 2010
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