Preparation and Characterization of Au/Pd Modified-TiO2 Photocatalysts for Phenol and Toluene Degradation under Visible Light—The Effect of Calcination Temperature - Publication - Bridge of Knowledge

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Preparation and Characterization of Au/Pd Modified-TiO2 Photocatalysts for Phenol and Toluene Degradation under Visible Light—The Effect of Calcination Temperature

Abstract

Rutile loaded with Au/Pd nanoparticles was prepared using a water-in-oil microemulsion system of water/AOT/cyclohexane followed by calcination.Theeffect of calcination temperature (from350 to 700∘C) on the structure ofAu/Pd nanoparticles deposited at rutile matrix and the photocatalytic properties of Au/Pd-TiO2 was investigated in two model reactions (toluene degradation in gas phase and phenol degradation in aqueous phase). The sample 0.5 mol% Pd/TiO2 exhibited the highest activity under visible light irradiation in gas and aqueous phase reaction among all photocatalysts calcined at 350∘C, while the sample modified only with gold nanoparticles showed the lowest activity. The Au/Pd-TiO2 sample calcinated at 350∘C possesses the highest photocatalytic activity when degrading phenol under visible light, which is 14 times higher than that of the one calcinated at 450∘C. It was observed that increasing temperature from 350 to 700∘C during calcination step caused segregation of metals and finally resulted in photoactivity drop.

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DOI:
Digital Object Identifier (open in new tab) 10.1155/2014/918607
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Category:
Articles
Type:
artykuł w czasopiśmie wyróżnionym w JCR
Published in:
Journal of Nanomaterials no. 2014, pages 1 - 9,
ISSN: 1687-4110
Language:
English
Publication year:
2014
Bibliographic description:
Malankowska A., Nowaczyk G., Jarek M., Zaleska-Medynska A.: Preparation and Characterization of Au/Pd Modified-TiO2 Photocatalysts for Phenol and Toluene Degradation under Visible Light—The Effect of Calcination Temperature// Journal of Nanomaterials. -Vol. 2014, (2014), s.1-9
DOI:
Digital Object Identifier (open in new tab) 10.1155/2014/918607
Verified by:
Gdańsk University of Technology

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