Photocatalytic Degradation of 2,4-Dicholorophenoxyacetic Acid: A Herbicide by Nanocrystalline semiconductor material under Visible Light Irradiation

Agricultural runoff is a serious source of water pollution in the recent past. Environmental remediation employing semiconductor photocatalysis using metal oxides under visible light irradiation is often attempted for degradation of organics. In the present investigation, ZnO was prepared and applie...

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Bibliographic Details
Published in:Materials today : proceedings 2019, Vol.17, p.345-353
Main Authors: Suganya Josephine, G.A., Jayaprakash, K., Suresh, M., Sivasamy, A.
Format: Article
Language:English
Subjects:
4-D- Photocatalys
Agricultural runoff 2
Visible light
ZnO
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Summary:Agricultural runoff is a serious source of water pollution in the recent past. Environmental remediation employing semiconductor photocatalysis using metal oxides under visible light irradiation is often attempted for degradation of organics. In the present investigation, ZnO was prepared and applied as a photocatalyst under visible light irradiation for the degradation of 2,4-D, one of the most widely used herbicide in the agricultural sector. Nanocrystalline ZnO was synthesized by a precipitation technique and characterized by various techniques like XRD, FT-IR, FE-SEM, EDAX, AFM, XPS and UV-DRS. The photocatalytic studies were conducted for the degradation of 2,4-D under visible light irradiation using nanocrystalline ZnO. Studies on the effect of pH, catalytic dosage and initial 2,4-D concentration were conducted in order to optimize the conditions and the kinetics of the degradation process followed a pseudo-first order. The completion of degradation was analyzed by UV-Vis spectroscopy, COD and ESI-MS+ analysis.
ISSN:2214-7853
2214-7853
DOI:10.1016/j.matpr.2019.06.440