2016 Fiscal Year Annual Research Report
ｇ－Ｃ３Ｎ４／半導体複合材料の構築と表界面制御による二酸化炭素光還元の高機能化
| Project/Area Number |
15F15070
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
葉 金花 国立研究開発法人物質・材料研究機構, 国際ナノアーキテクトニクス研究拠点, MANA主任研究者 (90230630)
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| Co-Investigator(Kenkyū-buntansha) |
ZHAO GUIXIA 国立研究開発法人物質・材料研究機構, 国際ナノアーキテクトニクス研究拠点, 外国人特別研究員
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| Project Period (FY) |
2015-07-29 – 2017-03-31
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| Keywords | Photocatalysis / Carbon nitride / H2 evolution / CO2 reduction |
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| Outline of Annual Research Achievements |
The project is mainly focused on exploring highly efficient photocatalysts for chemical fuel production based on visible-light responsive organic semiconductor, i.e. carbon nitride. We have been devoted to enhance the charge carrier separation and transport through the following two pathways and have obtained significant progress:
1) Constructing an imine-linked antenna-reaction center complex composed of low-molecular-weight carbon nitride and Co porphyrin, where the photo-generated electron-hole is separated more efficiently since electrons could be easily trapped by Co(II) to form Co(I) species and the active site immobilized on the C-N framework facilitated the redox photocatalytic reaction;
2) Designing carbon nitride with enhanced in-planar ordering by controlling the self-assembly of heptazine precursors and calcination of the assembled precursors, where the intraplanar transport of the photo-generated charge carriers can be largely enhanced. It was found that the sub-micro rod-like morphology of the assembled heptazine precursor was well maintained during the poly-condensation without volumetric shrinkage in spite of different temperature-rise rates in the calcination process. The enhanced ordering within the graphitic planar and the induced excellent charge separation contributed to a tremendously improved H2 evolution rate of 420 umol/h under visible light (λ > 420 nm) with an apparent quantum efficiency of 8.9% at 420 nm, which is among the highest value for C3N4-related photocatalyst in the literature.
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| Research Progress Status |
28年度が最終年度であるため、記入しない。
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| Strategy for Future Research Activity |
28年度が最終年度であるため、記入しない。
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[Journal Article] In Situ Bond Modulation of Graphitic Carbon Nitride to Construct p-n Homojunctions for Enhanced Photocatalytic Hydrogen Production2016
Author(s)
Guigao Liu, Guixia Zhao, Wei Zhou, Yanyu Liu, Hong, Pang, Huabin Zhang, Dong Hao, Xianguang Meng, Peng Li, Tetsuya Kako, and Jinhua Ye
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Journal Title
Adv. Func. Mater.
Volume: 26
Pages: 6822-6829
DOI
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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