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Heterogeneous photocatalyzed degradation of a pesticide derivative, 3-chloro-4-methoxyaniline, in aqueous suspensions of titania

Khan, A. and Mir, Niyaz A. and Haque, M. M. and Muneer, M. and Vijayalakshmi, S. and Boxall, C. (2012) Heterogeneous photocatalyzed degradation of a pesticide derivative, 3-chloro-4-methoxyaniline, in aqueous suspensions of titania. Research on chemical intermediates, 38 (7). pp. 1323-1333. ISSN 0922-6168

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Abstract

The photocatalyzed degradation of a pesticide derivative, 3-chloro-4-methoxyaniline (1), has been investigated in aqueous suspensions of titanium dioxide (TiO2) and air as a function of irradiation time under a variety of conditions using UV-Vis spectroscopic and HPLC analysis techniques. The degradation kinetics were studied under different conditions such as types of TiO2 powders, reaction pH, catalyst loading, substrate, and H2O2 concentrations. The photocatalyst Degussa P25 showed better photocatalytic activity for the degradation of the compound 1. Addition of hydrogen peroxide as an electron acceptor in addition to oxygen greatly enhanced the degradation rate of the compound 1. Higher degradation rates were observed at lower and higher pH values, i.e., 3.15 and 9.15, respectively. The optimal substrate concentration and catalyst loading for the degradation was found to be 0.6 mM with 1.5 g L-1. A probable pathway for the decomposition of compound 1 is proposed.

Item Type: Article
Journal or Publication Title: Research on chemical intermediates
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Departments: Faculty of Science and Technology > Engineering
Faculty of Science and Technology > School of Computing & Communications
ID Code: 60071
Deposited By: ep_importer_pure
Deposited On: 19 Nov 2012 09:17
Refereed?: Yes
Published?: Published
Last Modified: 10 Apr 2014 00:20
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/60071

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