Synthesis and characterization of copper oxide nanoparticles using Brassica oleracea var. italic extract for its antifungal application

Abstract Green synthesis has emerged as a reliable, sustainable and ecofriendly protocol for synthesizing a wide range of nanomaterials and hybrid materials. In this paper, we report the synthesis of Copper oxide nanoparticles by a simple biological route using the extract of Brassica oleracea var. italic and copper (II) acetate as the metal precursor. The synthesized copper oxide nanoparticles were characterized using UV–visible spectroscopy, FTIR spectroscopy, FESEM, EDAX, and XRD techniques. UV –Visible analysis shows a characteristic peak around 220 nm for copper oxide nanoparticles. FTIR spectroscopy was used to characterize various capping and reducing agents present in the plant extract responsible for nanoparticle formation. The surface morphology was characterized using FESEM. The EDAX and XRD pattern suggested that prepared copper oxide nanoparticles were highly pure. The average particle size was calculated as 26 nm using the XRD technique. Further, the nanoparticles were found to exhibit the highest antifungal activity against Aspergillus niger and Candida Albicans.