Green and chemical approach for synthesis of Ag2O nanoparticles and their antimicrobial activity

Green synthesis of nanomaterials is a current topic of extensive research and a number of green approaches as microorganisms and plant extracts have been explored as an alternative method for their synthesis. In this current work, an attempt has been made to observe the properties of silver oxide nanoparticles (Ag2O NPs), chemically prepared from silver ammonia complex by the traditional sol-gel method using citric acid, as well as from a green approach using aqueous leaf extract of Salix Integra. The synthesized Ag2O NPs were characterized by Powder X-ray Diffraction technique (PXRD), X-ray Photoelectron Spectroscopy (XPS), Scanning Electron Microscope (SEM), UV-Visible spectroscopy, Transmission electron microscope (TEM) and Fourier-Transform Infrared Spectroscopy (FT-IR). PXRD analysis showed that, the average particle size of the Ag2O NPs is 17.5 nm and 27.5 nm respectively from the chemical and the green approach. Green approach based Ag2O NPs and Salix Integra leaf extract are tested against gram-negative (E. coli) and gram-positive (S. aureus). In addition the Ag2O Nps were found to be effective against different microbial strains like M. tuberculosis H37Rv, M. Chelonae, M. Abscessus, and M. Fortuitum.

Automated summary

This study investigates the synthesis and properties of silver oxide nanoparticles using both traditional and green methods. The average particle size of the nanoparticles synthesized via the green method is 17.5 nm, while the chemical method results in a size of 27.5 nm. The green synthesized nanoparticles show antibacterial activity against E. coli and S. aureus, as well as effectiveness against various other microbial strains.