Rapid, Environment Friendly and Low Cost Fabrication of Co_3O_4 Nanoparticles with Antibacterial Activity

摘要

Nanotechnology with respect to green synthesis is the most interested area in material science today. Synthesis of metal oxide nanoparticles (MO NPs) by using plant-mediated materials is an economical and ecofriendly and is more affirmative in modern materials technology. In this studygreen synthesis of Co3O4 spinel, NPs is achieved from its metal salts by microwave assisted solvothermal method using pomegranate fruit peel extract as fuel. The UV-Vis spectroscopy analysis of pomegranate (Punica granatum) peel extract revealed the presence ofpolyphenolic compounds such as gallic acid, punicalagin A, punicalagin B and ellagic acid. The synthesized Co3O4 spinel NPs have been characterized by powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), transition electron microscopy (TEM), energy dispersiveX-ray spectroscopy (EDX), Fourier transform infrared spectroscopy (FTIR) UV-Vis spectroscopy (UV-Vis) and photoluminescence (PL) spectroscopy. The crystallographic studies from PXRD indicate, the crystalline nature of Co3O4 spinel NPs owing 40 ± 2.5 nm particlesize, and the same particle size is also been observed from the transition electron microscopy (TEM). FT-IR spectroscopic analysis confirms that, the existence of only cobalt and oxygen which indicates the purity of the Co3O4 spinel NPs. In addition, the antibacterialproperties of Co3O4 spinel NPs were investigated against gram +ve and gram –ve bacteria such as Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Proteus vulgaris, Klebsiella pneumonia, and Morganella morganii.