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In situ EPR studies of electron trapping in a nanocrystalline rutile

Paper ID Volume ID Publish Year Pages File Format Full-Text
26844 43981 2010 6 PDF Available
Title
In situ EPR studies of electron trapping in a nanocrystalline rutile
Abstract

This paper describes an in situ EPR study of electron trapping in a nanocrystalline rutile material. Irradiation at 4 K with broad-band UV–Vis light gives weak signals of trapped electrons. When irradiation is stopped, intense Ti3+ EPR signals appear, which can be removed again by resuming the irradiation. It is proposed that under irradiation there is a dynamic equilibrium established between creation of conduction band electrons, trapping of electrons, and excitation from trap sites back into the conduction band. When irradiation is stopped, conduction band electrons are trapped and remain so in the dark. Some initial results on the temperature and wavelength dependence of these processes are presented.

Keywords
Rutile; EPR; Trapped electrons; Trap sites
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In situ EPR studies of electron trapping in a nanocrystalline rutile
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 216, Issues 2–3, 15 December 2010, Pages 238–243
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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Any Questions? feel free to contact us