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Enhanced Photoreduction Activity of Carbon Dioxide over Co3O4/CeO2 Catalysts under Visible Light Irradiation
- Source :
- International Journal of Photoenergy, Vol 2015 (2015)
- Publication Year :
- 2015
- Publisher :
- Hindawi Limited, 2015.
-
Abstract
- A series of new two semiconductor catalysts, Co3O4/CeO2, were prepared by glycine-nitrate combustion method for photocatalytic reduction of carbon dioxide to produce methanol and ethanol under visible light (λ>400 nm) irradiation. The catalysts were characterized by BET, UV-vis spectra, XRD, SEM, PL, and XPS and the results indicated that the catalyst with 5 wt.% of Co3O4has the highest yield among all kinds of tests with the methanol yield of 1.52 μmol·g−1·h−1and the ethanol yield of 4.75 μmol·g−1·h−1, which are about 2.34 and 1.71 times as large as those of CeO2. However, methanol and ethanol can hardly be detected for Co3O4under the same condition because of its too narrow band gap. The improvement of the photoreduction activity of Co3O4doped CeO2was caused by the separation of electron-hole pairs of Co3O4/CeO2and charge transfer between Co3O4and CeO2, mimicking the Z-scheme in photosynthesis.
- Subjects :
- Article Subject
Renewable Energy, Sustainability and the Environment
Doping
lcsh:TJ807-830
Oxygen evolution
lcsh:Renewable energy sources
General Chemistry
Photochemistry
Atomic and Molecular Physics, and Optics
Catalysis
chemistry.chemical_compound
chemistry
Yield (chemistry)
Photocatalysis
General Materials Science
Methanol
Irradiation
Visible spectrum
Subjects
Details
- Language :
- English
- Volume :
- 2015
- Database :
- OpenAIRE
- Journal :
- International Journal of Photoenergy
- Accession number :
- edsair.doi.dedup.....f652f65361a2c5f49a3ce4cb77d8c52c