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Influence of an Electronic Structure of N-TiO2 on Its Photocatalytic Activity towards Decomposition of Acetaldehyde under UV and Fluorescent Lamps Irradiation

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Title: Influence of an Electronic Structure of N-TiO2 on Its Photocatalytic Activity towards Decomposition of Acetaldehyde under UV and Fluorescent Lamps Irradiation
Authors: Tryba, Beata Browse this author
Wozniak, Magdalena Browse this author
Zolnierkiewicz, Grzegorz Browse this author
Guskos, Nikos Browse this author
Morawski, Antoni Browse this author
Colbeau-Justin, Christophe Browse this author
Wrobel, Rafal Browse this author
Nitta, Akio Browse this author
Ohtani, Bunsho Browse this author →KAKEN DB
Keywords: N-TiO2
sol-gel
Electronic Paramagnetic Resonance (EPR)
electron-trap distribution
photocatalytic properties
Issue Date: Feb-2018
Publisher: MDPI
Journal Title: Catalysts
Volume: 8
Issue: 2
Start Page: 85
Publisher DOI: 10.3390/catal8020085
Abstract: The electronic structure of N-TiO2 samples prepared by a sol-gel method was investigated by EPR (Electronic Paramagnetic Resonance) measurements and the energy-resolved distribution of electron traps. In EPR spectra, some of the resonance lines assigned to paramagnetic species of nitrogen and Ti3+ were detected. Sample prepared at 300 degrees C revealed the highest intensity line of the nitrogen paramagnetic centers, whereas that prepared at 400 degrees C showed a paramagnetic line for Ti3+. Measurements of the electron trap distribution showed higher density of electron traps for sample prepared at 400 degrees C than that at 300 degrees C. Sample prepared at 300 degrees C, which revealed the highest amount of nitrogen built in the titania in the interstitial position was the most active under visible light. It was evidenced that photocatalytic decomposition of acetaldehyde was dependent strongly on the BET surface area and electrokinetic potential of the photocatalyst surface. The UV content in the fluorescent lamp affected the yield of acetaldehyde decomposition.
Rights: © 2018 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/).
https://creativecommons.org/licenses/by/4.0/
Type: article
URI: http://hdl.handle.net/2115/70215
Appears in Collections:触媒科学研究所 (Institute for Catalysis) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 大谷 文章

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