Reaction Kinetics, Mechanisms and Catalysis
Volume/Issue:
Volume 106: Issue 2
Photocatalytic degradation of chlorpyrifos in aqueous suspensions using nanocrystals of ZnO and TiO2
Authors:
V. Gnana Glory Kanmoni Department of Chemistry and Research Centre, Scott Christian College (Autonomous), Nagercoil 629003, Tamil Nadu, India

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,
Sheeba Daniel Department of Chemistry and Research Centre, Scott Christian College (Autonomous), Nagercoil 629003, Tamil Nadu, India

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G. Allen Gnana Raj Department of Chemistry and Research Centre, Scott Christian College (Autonomous), Nagercoil 629003, Tamil Nadu, India

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Pages:
325–339
Online Publication Date:
25 Mar 2012
Publication Date:
01 Aug 2012
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s11144-012-0433-5
Keywords:
Photodegradation; Chlorpyrifos; Nano ZnO; Nano TiO2
Restricted access

Abstract

The photocatalytic degradation of an organophosphorus insecticide chlorpyrifos (O,O-diethyl O-3,5,6-trichloro-2 pyridyl phosphorothioate) in aqueous suspensions of nano ZnO and nano TiO2 under sunlight is reported in this study. Nanocrystals of ZnO (34.3 nm) were prepared by the wet chemical method and TiO2 nanocyrstals (7.5 nm) were synthesized from titanium tetraisopropoxide by hydrolysis and peptization. The synthesized nanocrystals were characterized by X-ray diffraction, FT-IR, SEM–EDS and UV–Visible analytical techniques. The degradation of the insecticide was studied by monitoring the change in substrate concentration employing UV–Visible spectroscopy. The influence of catalyst loading, substrate concentration and pH were studied. The intermediates of the degradation process were identified by GC–MS. The synthesized nano ZnO and nano TiO2 demonstrated high photocatalytic activity under solar light. The results show that nanocrystals of TiO2 exhibit a better photocatalytic activity on the degradation of Chlorpyrifos than nanocrystals of ZnO.

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Cover Reaction Kinetics, Mechanisms and Catalysis
Reaction Kinetics, Mechanisms and Catalysis
Print ISSN:
1878-5190
Online ISSN:
1878-5204

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Reaction Kinetics, Mechanisms and Catalysis
Language English
Size B5
Year of
Foundation		 1974
Volumes
per Year		 1
Issues
per Year		 6
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1878-5190 (Print)
ISSN 1878-5204 (Online)

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