| Project/Area Number |
15K05658
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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 industrial materials
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| Research Institution | Kitakyushu National College of Technology |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
小畑 賢次 北九州工業高等専門学校, 生産デザイン工学科, 准教授 (70370046)
園田 達彦 北九州工業高等専門学校, 生産デザイン工学科, 准教授 (30403992)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Keywords | 光触媒 / 錯体重合法 / BiVO4 / 第一原理バンド計算 / Bi系複合酸化物 / 可視光応答 / Bi2WO6 / 異種元素添加 / 機器分析 / 無機微粒子の合成 / 電子構造計算 / 複合酸化物 / CaO-Bi2O3系複合酸化物 |
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| Outline of Final Research Achievements |
For bismuth complex oxides such as Sr2Bi2O5, BiVO4, and Bi2WO6, as highly pure and high-specific-surface-area powders relatively low temperatures were examined. The most appropriate methods were found to be a heterobimetallic complex method for the preparation of Sr2Bi2O5; a heterobimetallic complex and a polymerized complex method for BiVO4; and a citric acid complex method for Bi2WO6. Furthermore, photocatalytic activities were substantially enhanced by the addition of another element, for example the addition of La and Mo atoms effectively enhanced Sr2Bi2O5 and BiVO4, respectively. In particular, the absorption edge of the La-doped Sr2Bi2O5 exhibited a red shift compared with the pure Sr2Bi2O5, and this shift increased with increasing La3+ substitution. The structure-optimized calculation based on the density functional theory (DFT) approach revealed that the coordination number of oxygen surrounding the Bi3+-site increases with the introduction of La3+.
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