Affiliation:
1. Thin Film Research Lab Department of Physics Union Christian College Aluva Kerala 683102 India
2. Department of Biosciences Union Christian College Aluva Kerala 683102 India
3. Facultad de Ingenieria Mecanica Y Electrica Universidad Autonoma de Nuevo Leon Av. Universidad s/n, Cd. Universitaria San Nicolas de los Garza Nuevo Leon 66455 Mexico
4. Department of Physics Hope College Holland MI 49423 USA
5. UGC-DAE Consortium for Scientific Research Khandwa Road Indore Madhya Pradesh 452 001 India
Abstract
Herein, phytosynthesized copper doped cerium oxide nanoparticles (NPs) are synthesized and their application potential in antibacterial activity is investigated. The compensative effect of Cu2+ occupying Ce4+/Ce3+ site and redox conversion of Ce4+ to Ce3+ are found to facilitate the antibacterial activity of the doped NPs. The preliminary characterizations are done using X‐ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy, and energy‐dispersive analysis of X‐ray spectroscopy. The particle size distribution curves from field‐emission scanning data give the mean particle sizes to be ≈20.4, 19.9, and 18.8 nm, respectively, for pure, lightly doped, and heavily doped NPs. The transmission electron microscopy manifests tetra‐ and hexa‐shaped particles, indicating the presence of Ce2O3/Ce1−x
Cu
x
O2 along with ceria in pure and lightly doped and an additional presence of CuO in the heavily doped. The X‐ray photoelectron spectra of Ce 3d deconvolute to 10 peaks corresponding to Ce3+ and Ce4+ yielding Ce3+/Ce4+ % ratio <1 and Cu 2p and O 1s spectra are fitted to assess variation in Cu% and oxygen vacancies with doping. The Cu‐doped CeO2 samples show a commendable improvement over pure ceria, in the antibacterial activity against pathogenic bacteria Escherichia coli, Staphylococcus aureus, and Bacillus cereus.
Subject
Materials Chemistry,Electrical and Electronic Engineering,Surfaces, Coatings and Films,Surfaces and Interfaces,Condensed Matter Physics,Electronic, Optical and Magnetic Materials
Cited by
1 articles.
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