Green Synthesis, Structural and Optical Properties of Copper Oxide Nanoparticles using Malva Parviflora

Abstract

Green Synthesis of cupric Oxide nanoparticles (CuONPs) using the plant extract is an emerging field of extensive applications. In the present study, the CuONPs were carried out by reducing copper sulfate solution by the aqueous Malva parviflora leaves extract, where this plant is used as a reducing and capping agent. The precursor salt solution and reducing agent were mixed in a 1:4 volume ratio at 50 oC and pH=9. According to the UV-VIS spectrum, the surface plasmon resonance (SPR) absorption band was observed at 262 nm. UV-VIS spectroscopy also was employed to estimate the band gap energy of CuO nanoparticles, in which the optical band gap was varied depending upon the particle size and copper sulfate concentration. The XRD was found that synthesized CuONPs were Amorphous structure. FT-IR spectrum revealed that the presence of flavonoid may be the significant cause of reducing and capping of CuONPs. Furthermore, the mechanism of CuO nanoparticle formation has also been discussed.