Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 200, Issue -, Pages 141-149Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2016.06.074
Keywords
Photocatalysis; CO2 reduction; Carbon nitride; Co-porphyrin; Covalent hybrids
Funding
- JSPS (Japan Society for the Promotion of Science) Postdoctoral Fellowship for Foreign Researchers
- World Premier International Research Center Initiative (WPI Initiative) on Materials Nanoarchitectonics (MANA) (Japan)
- Grants-in-Aid for Scientific Research [15F15070] Funding Source: KAKEN
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A covalently linked reaction center/antenna hybrid composed of Co-porphyrin and low-molecular weight carbon nitride was developed for the reduction of CO2 into CO under visible light for the first time. The hybrids possessed thirteen-fold higher photocatalytic activity (17 mu mol/g/h) compared with bulk carbon nitride, and it is more than twice what it was in the Co-porphyrin loaded C3N4 heterojunction system. The efficient electron transfer and trapping by the Co active sites as well as the affinity of Co-porphyrin for CO2 are considered to account for the enhanced activity. Our findings may open a promising route to modify carbon nitride and provide a feasible approach to immobilize the active site into the light-harvest antenna for efficient electron-hole separation, electron transferring and the following redox reaction in photocatalytic process, which reforms the conventional semiconductor-cocatalyst heterojunction system. (C) 2016 Elsevier B.V. All rights reserved.
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