Green biosynthesis of ZnO nanomaterials and their anti-bacterial activity by using Moringa Oleifera root aqueous extract

Abstract

Fabrication of anti-bacterial nanomaterials made considerable progress in the catalytic method of green synthesis. In the current research work, a simple and environmentally convenient method was used for the synthesis of zinc oxide nanomaterials (ZnO-NMs) using the root extract of the Moringa oleifera. The fabricated MOR-ZnONMs were analysed by various analytical techniques such as UV–Vis absorption spectroscopy, Fourier transforms infrared spectroscopy (FT-IR), X-ray diffraction (XRD), Field emission scanning electron microscopy (FE-SEM), energy dispersive X-ray analysis (EDX), and photoluminescence spectroscopy. XRD analysis revealed that the synthesized MOR-ZnONMs have the hexagonal wurtzite structure. FT-IR confirmed the presence of various functional groups were responsible for the reduction of the metal ion into MOR-ZnONMs. The particles size, morphology and topography of the synthesized MOR-ZnONMs were determined by Dynamic Light Scattering and Transmission Electron Microscopy with significant measures. The intense and narrow widths of the zinc and oxygen present in the MOR-ZnONMs have been identified by utilizing EDX of high purity and crystalline nature. The prepared MOR-ZnONMs were tested for anti-bacterial activities and revealed that the maximum zones of inhibition were observed against Gram-positive and Gram-negative pathogenic bacteria.