Articles & Issues
- Language
- English
- Conflict of Interest
- In relation to this article, we declare that there is no conflict of interest.
- Publication history
-
Received July 4, 2022
Revised November 15, 2022
Accepted November 21, 2022
- Acknowledgements
- The Authors Soremo L Ezung, Mridushmita Baruah, and Shisak Sharma are grateful to University Grants Commission, New Delhi for the UGC Non-NET fellowship (PF/RDC/NNF-72/2018- 2912, PF/RDC/NNF-41/2017-1521, and NU/RDC/NNF-82/2020- 928). Suraj Kumar acknowledges the financial assistance from the Department of Science and Technology as INSPIRE Fellowship (IF190895). Support under DST-FIST (No. SR/FST/CSI-276/2016(C)) is also acknowledged.
- This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Photocatalytic degradation of the organophosphorus insecticide chlorpyrifos in aqueous suspensions using a novel activated carbon ZrO2-ZnO nanocomposite under UV light
Abstract
This paper describes the photocatalytic degradation of the organophosphorus insecticide chlorpyrifos in
aqueous suspensions using Schima wallichii activated carbon/ZrO2-ZnO (SWAC/ZrO2-ZnO) nanocomposite in UV
light. Analytical techniques such as XRD, FT-IR, TEM-SEAD, XPS, PL, and BET analyzer were used to characterize the
SWAC/ZrO2-ZnO nanocomposite. The BET surface area of the photocatalyst was found to be 223.387 m²g1
, having a
total pore volume of 0.1845 cm3
g
1
. The photocatalytic degradation of chlorpyrifos followed pseudo-first-order rate
kinetics with a half-life period (t1/2) of 7.088 mins and Kap (apparent rate constant) of 0.09778 min1
. The mechanism of
composite formation was explained using DFT investigations, which demonstrated a favorable immobilization of ZrO2-
ZnO on SWAC. Chemical descriptors gained from DFT investigations, such as HOMO-LUMO energy, ionization
energy, dipole moment, chemical softness, and chemical hardness, supported an understanding of the relative efficiency and reactivity of ZrO2-ZnO and SWAC/ZrO2-ZnO towards chlorpyrifos degradatio
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