Biogenic Synthesis of Potassium-Doped Cobalt Oxide Nanoparticles and Tailoring the Effect on Structural, Optical, Electrical and Antimicrobial Properties
DOI:
https://doi.org/10.12974/2311-8717.2026.14.05Keywords:
Egg albumen, Biopolymer, Microwave Assisted, Hydrothermal, Potassium dopant, Cobalt oxideAbstract
Limited size effects and a high surface to volume ratio cause the features of nanoparticles to differ from those of the comparable bulk material. Alkali metal substitution has been found to improve the optical and electrical properties of pure Co3O4. Utilizing non-toxic, affordable, and environmentally favourable compounds is crucial for the production of nanoparticles. In order to create nanoparticles, a variety of metabolites from plant materials and animal products can be used. These metabolites can serve as fuel, capping agents, reducing agents, stabilizing or chelating agents for collecting metal ions. Thus Pure Co3O4 and K doped Co3O4 nanoparticles are created in the current study using an egg white-based microwave assisted hydrothermal method. Since egg albumen is an emerging biopolymer for creating biodegradable composites. By using different molar amounts of potassium [1, 3, and 5 mole%] as a dopant, we tried to improve the optical and electrical conductivity of cobalt oxide nanoparticles made from egg albumen, the natural biopolymer with green credentials using a microwave-assisted hydrothermal method. X-ray diffraction, energy dispersive X-ray spectroscopy, SEM analysis and dielectric studies were used to evaluate bare and doped samples. The found topology and small average crystallite size emphasize egg albumin's role as a stabilizer and size controller. Reduced optical band gap recommends using K doped samples for UV light absorption, which favours for optoelectronic device fabrication. Thus, by regulating K concentration, we may improve electrical conductivity and optical property of Co3O4 nanoparticles for device fabrication. The use of egg albumen and metal oxide (i.e., cobalt oxide nanoparticles) in antibacterial applications are the primary focus.
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