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Efficient Complete Oxidation of Acetaldehyde into CO2 Over Au/TiO2 Core–Shell Nano Catalyst Under UV and Visible Light Irradiation

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Abstract:

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 TiO2−xFx.

Keywords: ACETALDEHYDE; CORE-SHELL STRUCTURE; MECHANISM; PHOTOCATALYSIS

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2009.1263

Publication date: October 1, 2009

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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