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The effect of platinum and silver deposits in the photocatalytic oxidation of resorcinol

Paper ID Volume ID Publish Year Pages File Format Full-Text
48726 46519 2007 10 PDF Available
Title
The effect of platinum and silver deposits in the photocatalytic oxidation of resorcinol
Abstract

The effects of platinum (Pt) and silver (Ag) metallisation in the photocatalytic oxidation of resorcinol at pH 3 ± 0.5 have been investigated. The photocatalytic degradation of resorcinol was significantly improved by Pt/TiO2, while the presence of Ag/TiO2 enhanced the initial photocatalytic degradation rate of resorcinol slightly. Likewise, the photocatalytic mineralisation of resorcinol continued to be enhanced by Pt/TiO2, but it was retarded when Ag/TiO2 was used.The function of Pt and Ag deposits on the surface of TiO2 has been found to be markedly influenced by the interaction of resorcinol and its degradation products with the metal deposits. The presence of Pt or Ag on the surface of TiO2 altered the distribution of degradation products of resorcinol as well as the production of photoactive species for the photocatalytic oxidation of resorcinol. The X-ray photoelectron spectroscopy (XPS), zeta potential and transmission electron microscopy (TEM) analyses have indicated that the contrasting effect of Pt and Ag deposits were governed by the oxidation states and the catalytic property of metal deposits. In addition to that, it has been found that the roles of metal deposits are specific and should not be generalised.

Keywords
Photocatalysis; Photodeposition; Platinum; Silver; Resorcinol
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The effect of platinum and silver deposits in the photocatalytic oxidation of resorcinol
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 72, Issues 3–4, 30 March 2007, Pages 363–372
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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