2013 Fiscal Year Final Research Report
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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| 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 |
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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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Research Products
(51 results)
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[Remarks] 伊熊泰郎、"いまさら聞けない、こんなこと―第16回、Q30:高温で物質の移動はなぜ起こるのか?、"耐火物, 63 [3] 154-155 (2011).
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[Remarks] 伊熊泰郎、"いまさら聞けない、こんなこと―第35回、Q63:なぜ焼結が進行するのか、"耐火物, 65 [2] 99-100 (2013).
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[Remarks] 伊熊泰郎、"いまさら聞けない、こんなこと―第44回、Q73:スピノーダル分解とは何か、耐火物でも起こるのか、"耐火物, 66 [1] 54-56 (2014).
