Abstract
Cerium oxide (CeO2) nanoparticles (NPs) of size ∼4 nm were successfully synthesized by green synthesis method using cerium nitrate as precursor and aloe-vera leaf extract as reducing and stabilizing agent. The switching between Ce3+ and Ce4+ state by reaction with H2O2 inferred the biomedical applications of CeO2 NPs. This switching enhances due to the presence oxygen vacancies and that was confirmed by photoluminescence spectrum. The SEM images showed spherical morphology of cubic fluorite structured CeO2 NPs which avoids the harming of cell. In the present study, CeO2 NPs show significant inhibition effect on gram negative bacteria, E. coli and P. aeruginosa which are responsible for food poisoning. Thus study analyze the synthesized CeO2 NPs as promising candidates for removal of biological pollutants and thus have great potential in the environmental remediation.
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