PH-dependent synthesis of CeO2-ZnO nanocomposite for enhanced environmental remediation of endosulfan and dimethoate pesticides

Abstract

This research aims to tackle significant challenges related to the synthesis and utilization of advanced nanocomposite materials in environmental remediation, specifically focusing on pesticide degradation. The synthesis of CeO2-ZnO nanocomposites employs both co-precipitation and hydrothermal methods, with the inclusion of the zwitterionic surfactant (SB-12) as a surface modifier. The modulation of pH levels during the synthesis of CeO2-ZnO nanocomposites allows for the optimization of crucial reaction parameters. Notably, it is observed that nanocomposites prepared at pH 9 exhibit the smallest average particle size. To comprehensively characterize these prepared nanocomposites, various analytical techniques such as FTIR, XRD, DR-UV/Vis, TEM/EDS, and Nano particle size analysis are employed. The FTIR results reveal a reduced presence of impurities at higher pH levels. Notably, the CeO2-ZnO nanocomposites synthesized via the hydrothermal method at pH 9 exhibit polyhedral nanostructures. The research's significant contribution lies in the practical application of these nanocomposites for the degradation of highly toxic and persistent organochlorine and organophosphorus pesticides, particularly Endosulfan and Dimethoate. These nanoparticles demonstrate remarkable pesticide degradation capabilities, with a particular emphasis on their high effectiveness against Endosulfan. The potential implications of this work extend to areas such as environmental protection, sustainable agriculture, and the remediation of pesticide-contaminated ecosystems.