Microwave-assisted Synthesis of Cobalt Oxide Nanoparticles with Carica papaya Leaf Extract and their Catalytic Activities

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The Physico-chemical and optical characteristics of cobalt oxide nanoparticles (CoONPs) have attracted interest in their creation over the past few years. In the current study, microwave irradiation was used to induce the production of CoONPs from papaya leaf extract. Papaya leaf extract was prepared by pulverizing and drying the plant's leaves. The extract was then heated to create an aqueous extract, which was purified and saved for analysis. Cobalt nitrate was added to the extract, and a dark brown color was obtained. CoO NPs were used as a catalyst in the reduction of MB and CR, with a mixture of MB solution and NaBH4 in DD water. The catalytic reduction of 4-NP was also tested using CoO NPs. The experimental procedures for characterizing Carica papaya leaf extract CoO NPs include UV-Vis spectra, TEM, and FTIR for analyzing nanomaterial morphology, size, and chemical composition. X-ray Diffraction (XRD) spectroscopy provides information about the crystalline structure, which is crucial for understanding nanomaterial behavior and potential applications in fields like medicine, electronics, and materials science. These methods are critical for understanding nanomaterial behavior and potential applications in various fields.