Green synthesis of Cordia myxa incubated ZnO, Fe2O3, and Co3O4 nanoparticle: Characterization, and their response as biological and photocatalytic agent

The imperative necessity for new therapy and catalysts has risen significantly due to infectious agents that are multi-resistant and organic toxins draining into our ecosystem. To address these problems, highly biocompatible Cordia myxa incubated I-ZnO, I-Co3O4, and I-Fe2O3 NPs were prepared and charac-terized by using a variety of techniques, including ultraviolet-visible spectroscopy (UV-vis), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR). The XRD diffraction pattern confirmed that I-ZnO hexagonal, while I-Co3O4 and I-Fe2O3 cubic structure. UV-vis spectra show the energy band -gap for I-ZnO, I-Fe2O3, and I-Co3O4 3.35 eV, 2.32 eV, and 2.44 eV, respectively. TEM analyses show the patterns of the morphology of I-ZnO as flower-shaped, I-Fe2O3 as rectangular, I-Co3O4 looks like prism crystals. EDX mapping confirmed the elemental presence of Zn, Fe, Co in the samples. The antibacterial study show that the I-NPs have bigger zone of inhibition (ZOI) than pristine NPs. The highest percentage for E-coli strain obtained in this trend (I-Fe2O3)81%>(I-ZnO)76%>(I-Co3O4)63%. Photocatalytic activity results revealed that the MB dye degraded after 80 min and efficiencies of I-(Fe2O3)98.38 %>I-ZnO98.12%>(I-Co3O4)93.93%. Furthermore, the green synthesis strategy certifies a new pathway for minimizing infections, oxidative stress, and degradation of key pollutants from the environment.(c) 2022 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.