2011 Fiscal Year Final Research Report
Establishment of photocatalyst systems act on the overall splitting of H_2O with high efficiency
| Project/Area Number |
21550191
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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 |
Inorganic industrial materials
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| Research Institution | Yamaguchi University |
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Principal Investigator |
SAKATA Yoshihisa 山口大学, 大学院・理工学研究科, 准教授 (40211263)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 光触媒 / 水分解反応 / 高活性化 / 酸化ガリウム / タンタル混合酸化物 / 金属イオン添加 / 調製法 / 助触媒 |
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| Research Abstract |
The influences of modifications to Ga_2O_3 and Ba-Ta mixed oxide photocatalysts towards the photocatalytic activity of H-2O splitting are investigated to develop photocatalyst systems which act on the overall splitting of H_2O with high efficiency. As the results, combination of the modifications as the suppression of the reverse reaction of the intermediates over the photocatalyst surfaces by the combination of effective co-catalyst, the suppression of the recombination of photo-produced electron and hole in the bulk of photocatalyst by controlling the bulk states by the addition of metal ions, and controlling the morphology by changing the preparation condition makes the photocatalytic activity improved remarkably, where the quantum yields shows more than 50%. Moreover, we also show that the quantum yield of photocatalytic H_2O splitting depends on the photon density of the irradiated light. On the basis of the result, we try to improve the photocatalytic performance on titanium mixed oxide photocatalysts.
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