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Green synthesis of ZnO-doped cerium oxide nanocomposite using clove extract: enhanced photocatalytic methylene blue degradation and antibacterial properties
Abstract
In this study, we present a green synthesis method for producing ZnO-doped CeO2 nanocomposites (ZnO–CeO2 NC) and CeO2 nanoparticles (NPs) using clove (Syzygium aromaticum)
extract. Our main objective is to assess their properties, focusing on
their photocatalytic and antibacterial activities. Through comprehensive
characterization techniques such as powder XRD, UV–vis DRS, and FTIR
analyses, we thoroughly evaluated the synthesized materials. Notably,
both the green-synthesized CeO2 (CLV30) NPs and ZnO–CeO2
(CZn) NCs demonstrated exceptional efficiency, degrading methylene blue
dye by 89% and 94%, respectively, under visible light irradiation. The
CZn nanocomposites exhibited remarkable reusability and stability over
four cycles. Additionally, significant antibacterial activity was
observed, with CLV30 exhibiting moderate effectiveness against
Gram-negative Escherichia coli (E. coli) (8 mm) and Gram-positive Staphylococcus aureus (S. aureus) (11 mm) compared to CZn, which displayed notable inhibitory zones of 24 mm and 35 mm against E. coli and S. aureus, respectively. These findings highlight the versatile applications of these nanomaterials across various fields.
