Journal article
Efficient complete oxidation of acetaldehyde into CO2 over Au/TiO2 core-shell nano catalyst under UV and visible light irradiation
Department of Chemistry and Centre for Materials Science and Nanotechnology, University of Oslo, PO Box 1033, Blindern, N-0315 Oslo, Norway,1
Photocatalytic degradation of acetaldehyde and its photocatalytic mechanisms over Au/TiO2 core-shell nano catalyst were, for the first time, investigated under UV and visible light irradiation. The results indicate that Au/TiO2 core-shell catalyst shows higher activity for the oxidation of acetaldehyde into CO2 under both UV and visible light irradiation comparing with P-25 and metal-deposited TiO2 photocatalysts.
When Au/TiO2 core-shell catalyst is excited by UV light, the Au-core acts as the sink to restore the separated electrons, thus to improve the photoinduced charge separation; while under visible light irradiation, the mechanism can be understood as the coordinate effect of the plasmon resonance of Au-core particles and the formation of an impurity energy level induced by TiO(2-x)F(x).
| Language: | English |
|---|---|
| Year: | 2009 |
| Pages: | 5891-5897 |
| ISSN: | 15334899 and 15334880 |
| Types: | Journal article |
| DOI: | 10.1166/jnn.2009.1263 |
