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Multiscale structural engineering of carbon nitride for enhanced photocatalytic H2O2 production
- Source :
- Nano Research. 16:4524-4530
- Publication Year :
- 2021
- Publisher :
- Springer Science and Business Media LLC, 2021.
-
Abstract
- Carbon nitride (C3N4) holds great promise for photocatalytic H2O2 production from oxygen reduction. In spite of great research efforts, they still suffer from low catalytic efficiency primarily limited by the fast recombination of photogenerated charge carriers. In this work, we report the multiscale structural engineering of C3N4 to significantly improve its optoelectronic properties and consequently photocatalytic performance. The product consists of porous spheres with high surface areas, abundant nitrogen defects, and alkali metal doping. Under visible light irradiation, our catalyst shows a remarkable H2O2 production rate of 3,080 µmol·g−1·h−1, which is more than 10 times higher than that of bulk C3N4 and exceeds those of most other C3N4-based photocatalysts. Moreover, the catalyst exhibits great stability, and can continuously work for 15 h without obvious activity decay under visible light irradiation, eventually giving rise to a high H2O2 concentration of ca. 45 mM.
- Subjects :
- Materials science
business.industry
Doping
chemistry.chemical_element
Structural engineering
Condensed Matter Physics
Alkali metal
Nitrogen
Atomic and Molecular Physics, and Optics
Catalysis
chemistry.chemical_compound
chemistry
Photocatalysis
General Materials Science
Charge carrier
Electrical and Electronic Engineering
Porous spheres
business
Carbon nitride
Subjects
Details
- ISSN :
- 19980000 and 19980124
- Volume :
- 16
- Database :
- OpenAIRE
- Journal :
- Nano Research
- Accession number :
- edsair.doi...........e1e7a9b66921d114dc2261ea6a91c2b1