In-situ X-ray Absorption Fine Structure Study of TiO2 Nanoparticles under Ultraviolet Light
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概要
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The local structural properties of TiO2 nanoparticles (NPs) were investigated under ultraviolet light (UV) using in-situ X-ray absorption fine structure measurements at the Ti K edge. XAFS analysis showed that the bond lengths of the atomic pairs were distorted by 0.1 Å and that the Debye–Waller factors of the atomic pairs were increased substantially under UV light, compared with those of no UV light. These results suggested that the local structural changes were caused by the photocatalyst reactivity of oxygen atoms in the NPs. Unlike other techniques, in-situ XAFS is sensitive to detect local structural changes during the photocatalytic reactivity.
- 2010-03-25
著者
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Sang-Wook Han
Division of Science Education, Institute of Fusion Science, and Institute of Science Education, Chonbuk National University, Jeonju 561-756, Korea
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Changha Kwak
Department of Materials Science and Engineering, Pohang University of Science and Technology, Pohang 790-784, Korea
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Seon-Hyo Kim
Department of Materials Science and Engineering, Pohang University of Science and Technology, Pohang 790-784, Korea
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Jeon Jong-Sul
Division of Science Education, Institute of Fusion Science, and Institute of Science Education, Chonbuk National University, Jeonju 561-756, Korea
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Kim Byung-Hyuk
Department of Physics and Institute of Fusion Science, Chonbuk National University, Jeonju 561-756, Korea
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Park Chang-In
Department of Physics and Institute of Fusion Science, Chonbuk National University, Jeonju 561-756, Korea
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Soo-Young Seo
Department of Materials Science and Engineering, Pohang University of Science and Technology, Pohang 790-784, Korea
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Chang-In Park
Department of Physics and Institute of Fusion Science, Chonbuk National University, Jeonju 561-756, Korea
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Jong-Sul Jeon
Division of Science Education, Institute of Fusion Science, and Institute of Science Education, Chonbuk National University, Jeonju 561-756, Korea
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Byung-Hyuk Kim
Department of Physics and Institute of Fusion Science, Chonbuk National University, Jeonju 561-756, Korea