PREPARATION OFAu-LOADEDTiO2BY PHOTOCHEMICAL DEPOSITION AND OZONE PHOTOCATALYTIC DECOMPOSITION

Panke He, Min Zhang, Dongmei Yang and Jianjun Yang ()
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Panke He: Laboratory for Special Functional Materials, Henan University, Kaifeng 475001, Henan, P. R. China
Min Zhang: Laboratory for Special Functional Materials, Henan University, Kaifeng 475001, Henan, P. R. China
Dongmei Yang: Laboratory for Special Functional Materials, Henan University, Kaifeng 475001, Henan, P. R. China
Jianjun Yang: Laboratory for Special Functional Materials, Henan University, Kaifeng 475001, Henan, P. R. China

Surface Review and Letters (SRL), 2006, vol. 13, issue 01, 51-55

Abstract: In this paper,Au-loadedTiO2(Au/TiO2)photocatalysts were prepared by photochemical deposition method and characterized by transmission electron microscopy, diffuse reflectance spectroscopy and X-ray photoelectron spectroscopy. The results indicated the metallicAunanoparticles were deposited on the surface ofTiO2after the high-pressure mercury irradiation and regarded as an electronegative center. The photocatalytic decomposition of gaseous ozone was investigated onTiO2andAu-loadedTiO2at room temperature. Results indicated that the photocatalytic conversion of ozone can be improved byAu/TiO2and photocatalytic activity increased with the increase of the photodeposition time. The photocatalytic removal rate of ozone remained above 96% on the surface of 1%Au/TiO2with photodeposition for 120 min under black lamp irradiation for 20 h.Aucluster deposited on the surface ofTiO2functioned not only as the electron trap center but also as the adsorption site ofO3in photocatalytic reaction.

Keywords: Photochemical deposition; photocatalysis; Au/TiO2; photocatalytic decomposition; ozone (search for similar items in EconPapers)
Date: 2006
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DOI: 10.1142/S0218625X06007810

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