Preparation and Characterization of Cobalt and Zinc Oxide Preparation and Characterization of Cobalt and Zinc Oxide Nanoparticles using Green Synthesis method for technological development

Authors

Fatma A. Sultan, Nanomaterials Lab., Physics Department, Faculty of Science, Al-Azhar University (GirlBranch), Cairo 11751, Egypt
Radwa A. El-Salamony, Reactor Engineering and Operations Lab., Process Development Department, Egyptian Petroleum Research Institute, Nasr City, Cairo11727, Egypt
Shima A. Said, Nanomaterials Lab., Physics Department, Faculty of Science, Al-Azhar University (GirlBranch), Cairo 11751, Egypt
Kamilia S. Abdu, Nanomaterials Lab., Physics Department, Faculty of Science, Al-Azhar University (GirlBranch), Cairo 11751, EgyptFollow

Document Type

Original Article

Subject Areas

Physics

Keywords

Green synthesis with eggplant extract, Lattice dynamics, Structural and optical characterization

Abstract

The objective of this study was to investigate the action of eggplant as a plant extract on the physical properties of cobalt oxide (Co₃O₄) and zinc oxide (ZnO) nanoparticles synthesized by sol gel for future use as dye degradation photo catalysts. The chemical sol-gel method yields (Co3O4)_c and (ZnO)_c samples whereas the green synthesis method using eggplant produces (Co₃O₄)_gs and (ZnO)_gs samples. Structural studies using XRD reveal the formation of the cubic and the hexagonal phases for Co₃O₄ and Snow respectively. No valuable changes occur in lattice parameters upon green synthesis. The fourier transform infrared studies confirm the formation of oxide networks for both. It also reveals the creation of -OH groups that enhance the photo degradation efficiency. Optical data demonstrate a wider optical band gap for (Co₃O₄)_gs. On the contrary, (ZnO)_c shows a smaller optical band gap value upon green synthesis. Regarding the detected photoluminescence data, (Co₃O₄)_c and (Co₃O₄)_gs show, respectively, blue and green emission colors, whereas both (ZnO)_c and (ZnO)_gs produce green emissions. Since rare works have been recorded, the present data nominate green synthesized oxides using eggplant extract as leaders for photocatalytic and light emission technology.

How to Cite This Article

Sultan, Fatma A.; El-Salamony, Radwa A.; Said, Shima A.; and Abdu, Kamilia S. (2025) "Preparation and Characterization of Cobalt and Zinc Oxide Preparation and Characterization of Cobalt and Zinc Oxide Nanoparticles using Green Synthesis method for technological development," Al-Azhar Bulletin of Science: Vol. 36: Iss. 1, Article 3.
DOI: https://doi.org/10.58675/2636-3305.1694