Behavior of photogenerated charge carriers on visible-light responsive photocatalysts
Project/Area Number |
23360360
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Catalyst/Resource chemical process
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Research Institution | Toyota Technological Institute |
Principal Investigator |
YAMAKATA AKIRA 豊田工業大学, 工学(系)研究科(研究院), 准教授 (60321915)
|
Project Period (FY) |
2011-04-01 – 2016-03-31
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Project Status |
Completed (Fiscal Year 2015)
|
Budget Amount *help |
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2012: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2011: ¥9,490,000 (Direct Cost: ¥7,300,000、Indirect Cost: ¥2,190,000)
|
Keywords | 光触媒 / キャリアーダイナミクス / 再結合 / 電荷移動 / 水分解 / 時間分解分光 / 可視光応答型光触媒 / 光励起キャリアーダイナミクス / 再結合速度 / 電荷移動速度 / 時間分解赤外分光 / 光励起キャリアー |
Outline of Final Research Achievements |
Photocatalytic activity is determined by the competition between the charge carrier recombination and charge transfer to the reactants molecules. Therefore, in order to improve the photocatalytic activity, the behavior of photogenerated charge carriers should be elucidated and controlled. In this work, we established a new method to study the behavior of photogenerated electrons and holes as well as their energy states by using time-resolved visible to mid-IR absorption spectrometers. We found that most of photogenerated electrons in powder SrTiO3 are trapped at the defects on powders, but the electron-trapping decelerates the recombination and works to enhance photocatalytic activities. Furthermore, when SrTiO3 powders are doped with transition metals such as Ni, the lifetime of charge carriers is much elongated, although it has been widely believed that the doping accelerated the recombination. These information is necessary to develop more efficient photocatalysts.
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Report
(5 results)
Research Products
(128 results)
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[Journal Article] KCl flux-induced growth of isometric crystals of cadmium-containing early transition-metal (Ti4+, Nb5+, and Ta5+) oxides and nitridability to form their (oxy)nitride derivatives under an NH3 atmosphere for water splitting application2016
Author(s)
Mirabbos Hojamberdiev, Hajime Wagata, Kunio Yubuta, Kenta Kawashima, Junie Jhon M. Vequizo, Akira Yamakata, Shuji Oishi, Kazunari Domen, Katsuya Teshima
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Journal Title
Applied Catalysis B: Environmental
Volume: 182
Pages: 626-635
DOI
Related Report
Peer Reviewed / Acknowledgement Compliant
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[Journal Article] Photocatalytic property of metal ion added SrTiO3 to Overall H2O splitting2015
Author(s)
Yoshihisa Sakata, Yoshiko Miyoshi, Tatsuya Maeda, Kohki Ishikiriyama, Yuki Yamazaki, Hayao Imamura, Yeilin Ham, Takashi Hisatomi, Jun Kubota, Akira Yamakata, Kazunari Domen
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Journal Title
Applied Catalysis A: General
Volume: 印刷中
Pages: 227-232
DOI
Related Report
Peer Reviewed / Acknowledgement Compliant
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[Presentation] Naイオンを添加したSrTiO3の水の完全分解反応に対する光触媒特性2013
Author(s)
酒田喜久, 三好喜子, 田中修平, 前田竜也, 田中英之, 今村速夫, Ham Yeilin, 久富隆史, 久保田純, 堂免一成, 山方啓
Organizer
第112回触媒討論会
Place of Presentation
秋田大学手形キャンパス, 秋田県
Year and Date
2013-09-19
Related Report
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[Presentation] N-H Peak Shift in GaAsN by Band Gap Exitation2013
Author(s)
Kazuma Ikeda, M. Inagaki, Nobuaki Kojima, Yoshio Ohshita, Masafumi Yamaguchi, Akira Yamakata
Organizer
9th International Conference on Concentrator Photovoltaic Systems (CPV-9)
Place of Presentation
Phoenix Seagaia Resort, Miyazaki, Japan
Year and Date
2013-04-15
Related Report
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