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
Issue Date: 2007
Source: Solid state phenomena, 2007, v. 124-126, p. 1745-1748
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.
Keywords: Chlorophenols
Photodegradation
Ag deposition
Sol-gel
TiO2
UV light
Publisher: Scientific.Net
Journal: Solid state phenomena 
ISSN: 1012-0394
EISSN: 1662-9779
DOI: 10.4028/www.scientific.net/SSP.124-126.1745
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

WEB OF SCIENCETM
Citations

2
Last Week
0
Last month
Citations as of Sep 20, 2020

Page view(s)

146
Last Week
3
Last month
Citations as of Sep 20, 2020

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.