Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/29945
Title: The use of oxyhalogen in photocatalytic reaction to remove o-chloroaniline in TiO2 dispersion
Authors: Choy, WK
Chu, W 
Keywords: Mineralization
o-Chloroaniline
Oxyhalogens
Photodecay
Radicals
TiO2
Issue Date: 2007
Publisher: Pergamon Press
Source: Chemosphere, 2007, v. 66, no. 11, p. 2106-2113 How to cite?
Journal: Chemosphere 
Abstract: Photodecay of o-chloroaniline (o-ClA) in various combinations of UV sources, TiO2, and oxyhalogens was investigated. To improve the conventional photocatalytic process by using UV/TiO2, the addition of oxyhalogens (ClO3 -, BrO3 - and IO3 -) into UV/TiO2 system was studied and the effect in such addition is very encouraging for all the selected additives. Oxyhalogens are capable of deferring the electron-hole recombination of TiO2 which significantly improved its catalytic performance. The presence of IO3 - in UV/TiO2 resulted in the fastest o-ClA decay among three oxhalogens at the same dosage. The decay of o-ClA in UV/TiO2/oxyhalogen process is characterized by a two-stage pseudo-kinetics, where a faster initial decay was followed by a retardation state. A mathematics model was successfully established for the prediction of the two-stage decay of o-ClA in UV / TiO2 / IO3 - with any designed [IO3 -] concentration.
URI: http://hdl.handle.net/10397/29945
ISSN: 0045-6535
EISSN: 1879-1298
DOI: 10.1016/j.chemosphere.2006.09.027
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