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All Journal International Journal of Applied Sciences and Smart Technologies
Nworie, Ikechukwu Christian
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Computer Science & IT Energy Engineering Industrial & Manufacturing Engineering

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A Green Pathway to Advanced Cobalt Oxide Materials: Dye Integration and Phytochemical Modification Otah, Patricia Benedict; Nworie, Ikechukwu Christian; Echeweozo, Eugene; Ojebeagu, Augustine; Chikwendu, Augustine; Nwigwe, God`swill
International Journal of Applied Sciences and Smart Technologies Volume 07, Issue 1, June 2025
Publisher : Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/ijasst.v7i1.11611

Abstract

This study investigated the impact of natural dyes derived from three plant sources (Eupatorium odoratum, Ageratum conyzoides, and Pueraria phaseoloides) on the bandgap energies of cobalt oxide (CoO) thin films thin films were synthesized using a chemical bath deposition technique at 80-85°C and subsequently annealed at 100°C, 150°C and 200°C. The incorporation of these natural dyes significantly influenced the bandgap energies of the CoO films, with values ranging from 3.80 eV to 4.12 eV depending on the dye and annealing temperature with the as-grown films exhibiting bandgap energies ranging from 3.80 eV to 4.00 eV. Moderate heat treatment typically increased the bandgap of the films, but at higher temperatures, the behavior became more complex, with some dyes demonstrating a substantial reduction in bandgap. These findings demonstrate the potential of utilizing natural dyes to effectively tailor the electronic structure of CoO, offering a sustainable and eco-friendly approach to materials modification.
Co-Authors Chikwendu, Augustine Echeweozo, Eugene Nwigwe, God`swill Ojebeagu, Augustine Otah, Patricia Benedict