Hierarchically synthesis of M@CeO2 (M = Ba, Er) nanoparticles for Antibacterial efficacy

Abstract

Cerium oxide fine particles injected with metallic nanoparticles were produced using the co-precipitation method and characterized using various techniques such as XRD, SEM, FTIR, UV–Vis, and PL. Both injected and non-doped ceria nanoparticles exhibited a crystallographic structure similar to calcium fluoride. The nanoparticles ranged in size from 25 to 74 nm and had an inconsistent spherical shape. EDX analysis confirmed the presence of Erbium (Er) and Barium (Ba) in the ceria nanocrystal lattices. UV–Vis experiments showed that the optical band gap efficiency of purified CeO2 NPs was 3.1 eV, while doped CeO2 NPs had an energy level of 2.9 eV. The nanoparticles exhibited a sharp emission peak at approximately 347 nm. The synthesized CeO2 NPs showed antibacterial activity against Gram-positive and Gram-negative bacteria, including Bacillus subtilis, Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa. Overall, the results demonstrate that the doping of ceria nanoparticles with metallic nanoparticles can significantly enhance their antibacterial properties. This research paves the way for the development of novel antibacterial agents with potential applications in various fields such as medicine, food packaging, and water treatment.

Keywords

• CeO2 NPs
• Ba / Er @ CeO2 NPs
• Co-precipitation method
• SEM/EDX