Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/62887
Title: Heterogeneous photocatalytic degradation of chlorophenols over Ag-TiO2 nano particles in an aqueous suspension
Authors: Rengaraj, S
Yeon, JW
Li, XZ
Jung, YJ
Kim, WH
Keywords: Chlorophenols
Photodegradation
Ag deposition
Sol-gel
TiO2
UV light
Issue Date: 2007
Publisher: Scitec Publications Ltd
Source: Diffusion and defect data. Part B, Solid state phenomena : solid state data, 2007, v. 124-126, p. 1745-1748 How to cite?
Journal: Diffusion and defect data. Part B, Solid state phenomena : solid state data 
Abstract: In the present work, TiO2 and Ag-TiO2 catalysts were prepared by an ultrasonic assisted sol-gel method. The physico-chemical characteristics studies of the newly synthesized catalysts were carried out by XRD, TEM, EDX, XPS, UV-Visible absorption spectra and an optical ellipsometry. In order to find out the optical absorption properties of the catalysts, theoretical simulations have been carried out by using the Tauc-Lorentz oscillator model. Photodegradation and mineralisation of the chlorophenols were confirmed by the HPLC and TOC measurements. The rate of a mineralisation trend was observed in the order of P < 2-CP < 2,4-DCP < 2,6-DCP < 4-CP < 2,4,6-TCP by using the Ag-TiO2 catalyst. The concentration of the main aromatic intermediate products was considerably lower for the Ag-TiO2 photocatalysts than for pure TiO2. This experiment demonstrated that the presence of Ag on TiO2 catalysts could enhance the photocatalytic oxidation of chlorophenols in an aqueous suspension. It was found that the degradation of the chlorphenols by these catalysts followed the pseudo- first order kinetic model.
URI: http://hdl.handle.net/10397/62887
ISSN: 1012-0394 (print)
1662-9779 (online)
DOI: 10.4028/www.scientific.net/SSP.124-126.1745
Appears in Collections:Journal/Magazine Article

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