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  • 1 Department of Chemistry and Research Centre, Scott Christian College (Autonomous), Nagercoil 629003, Tamil Nadu, India
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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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  • Impact Factor (2019): 1.520
  • Scimago Journal Rank (2019): 0.345
  • SJR Hirsch-Index (2019): 39
  • SJR Quartile Score (2019): Q3 Physical and Theoretical Chemistry
  • SJR Quartile Score (2019): Q4 Catalysis
  • Impact Factor (2018): 1.142
  • Scimago Journal Rank (2018): 0.374
  • SJR Hirsch-Index (2018): 37
  • SJR Quartile Score (2018): Q3 Physical and Theoretical Chemistry
  • SJR Quartile Score (2018): Q3 Catalysis

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Reaction Kinetics, Mechanisms and Catalysis
Language English
Size B5
Year of
Foundation
1974
Volumes
per Year
3
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)