2011 Fiscal Year Final Research Report
The rational design of nitrogen doped TiO2 visible-light response photocatalysts by a combination of synchrotron spectroscopy and electron microscopy techniques
| Project/Area Number |
21560798
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Catalyst/Resource chemical process
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| Research Institution | Nagoya University |
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Principal Investigator |
YOSHIDA Tomoko 名古屋大学, エコトピア科学研究所, 准教授 (90283415)
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| Co-Investigator(Kenkyū-buntansha) |
MUTO Shunsuke 名古屋大学, 工学研究科, 教授 (20209985)
TATSUMI Kazuyoshi 名古屋大学, 工学研究科, 講師 (00372532)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 光触媒 / 放射光分光 / 電子分光 |
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| Research Abstract |
Energetic nitrogen ion was implanted into a TiO2 catalyst in order to promote the photocatalytic activity under visible-light irradiation. N K-edge XANES and ELNES revealed two types of chemical state of nitrogen, depending on the concentration, where an O atom in TiO2 was replaced by N for the active photocatalyst, and that of substitutional NO2 for the inactive photocatalyst. We also estimated that the local nitrogen concentration effective for visible-light response was less than ca. 2 at%. It was also found that the photocatalytic active state was offset by the coexisting photocatalytic inactive state.
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