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Double defects modified carbon nitride nanosheets with enhanced photocatalytic hydrogen evolution
- Source :
- Physical Chemistry Chemical Physics. 20:17471-17476
- Publication Year :
- 2018
- Publisher :
- Royal Society of Chemistry (RSC), 2018.
-
Abstract
- Graphitic carbon nitride (g-C3N4) is an actively investigated metal-free photocatalyst for solar energy conversion. However, primary g-C3N4 usually exhibits limited utilization of visible light and fast combination of photoexcited charge carriers, resulting in low photocatalytic H2 evolution activity. Defect-modified g-C3N4 shows much enhanced photocatalytic H2 evolution activity owing to extended light absorption as well as efficient charge separation and transfer. Here, the photocatalyst simultaneously containing nitrogen vacancies and O-doping is successfully developed by using a two-step post-synthetic strategy for photocatalytic H2 evolution, resulting in a greatly-boosted H2 evolution activity (1.69 × 103 μmol g-1 h-1) compared with that of pristine g-C3N4 (1.12 × 102 μmol g-1 h-1). It is believed that the newly developed double-defect strategy may open an avenue toward obtaining molecular level comprehension of the function of a catalyst in photocatalytic H2 evolution and can be extended to the modification of other semiconductors.
- Subjects :
- Materials science
business.industry
Graphitic carbon nitride
General Physics and Astronomy
chemistry.chemical_element
02 engineering and technology
Nitride
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Nitrogen
0104 chemical sciences
Catalysis
chemistry.chemical_compound
Semiconductor
chemistry
Chemical engineering
Photocatalysis
Charge carrier
Physical and Theoretical Chemistry
0210 nano-technology
business
Visible spectrum
Subjects
Details
- ISSN :
- 14639084 and 14639076
- Volume :
- 20
- Database :
- OpenAIRE
- Journal :
- Physical Chemistry Chemical Physics
- Accession number :
- edsair.doi.dedup.....b92ade120977dc7dd8df023dd6c91ba0