Green synthesis and characterization of biocompatible zinc oxide nanoparticles and evaluation of its antibacterial potential

Abstract

The present study described the synthesis of biocompatible Zinc oxide nanoparticles from the zinc acetate through eco-friendly green process using leaf extract of Cassia auriculata leaf and their antibacterial activity. The green synthesized ZnO nanoparticles were characterized by Fourier-transform infrared (FTIR) spectroscopy, Ultra violet visible spectroscopy, Photoluminescence spectroscopy, X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM). FTIR studies confirm the presence of bio molecules and metal oxides. The calculated optical band gap values of the material to be around 3.3 eV. PL spectrum study revealed the optical properties of ZnO NPs. The biosynthesized nanoparticle synthesized from leaf extract of Cassia auriculata exhibited strong antibacterial activity Bacillus subtilis, Klebsiella pneumonia, Pseudomonas aeruginosa and Proteus mirabilis. Thus, it may be used in the surface coating of food package to prevent the bacterial contamination.

Keywords

• Green synthesis
• Cassia auriculata
• FTIR
• Optical band gap
• FE-SEM
• Antibacterial activity