Enhancement of photocatalytic activity of rutile titanium dioxide single crystals by ordering surface oxygen defects
| Project/Area Number |
23560807
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | Kanagawa Institute of Technology |
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Principal Investigator |
IKUMA Yasuro 神奈川工科大学, 工学部, 教授 (10159593)
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| Co-Investigator(Renkei-kenkyūsha) |
NIWA Koichi 神奈川大学, 工学部, 非常勤講師 (80468892)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2013: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2011: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
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| Keywords | 光触媒 / 有機酸の分解 / 面方位依存性 / 表面多重溝 / 表面Ｘ線回折 / 酸化チタン単結晶 / 多重溝 / 面方位 / 酸化チタン / 表面構造 |
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| Research Abstract |
Photocatalytic activity of titanium dioxide is normally discussed in terms of band theory. There are, however, other factors that are also important for the photocatalytic activity, especially when surface oxygen is involved in the reaction. In this study we investigated the relation between the surface condition of rutile titanium dioxide single crystals and the photocatalytic activity: (1) Effect of crystallographic orientation of as-received (polished) surface on the photocatalytic activity, (2) Effect of surface treatment on the photocatalytic activity and contact angle, (3) Structural analysis of (001) surface, etc. We find that (001) surface is the most active surface among the low index surfaces of rutile titanium dioxide, that the activity decreases as the surface is heated or treated in HF solution, and that multiple parallel grooves must be introduced in certain direction on the low active surface before the activity is regained.
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Report
(4 results)
Research Products
(93 results)
