Abstract
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.
Graphical Abstract

The successful synthesis of Ag2O NPs by green and chemical approached and their use as a bactericidal agent against different microbes.
Highlights
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Synthesis of Ag2O NP’s using green and chemical methods from Silver Ammonia Complex.
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Characterization and comparative studies of the properties of the prepared Ag2O NP’s.
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Studies for the bioapplication of Ag2O NP’s for antimicrobial studies.
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Acknowledgements
We gratefully acknowledge Malaviya National Institute of Technology Jaipur, India (all experimental work, TEM, SEM, and FT-IR studies) and Central University of Rajasthan, India (PXRD). We also acknowledge Dr. Sonkar S.K. (UV‐Vis study) for their invaluable aid. And our special thanks CSIR-Central Drug Research Institute, Lucknow, India (Antimicrobial activity test). We thankful to APX LABORATORIES Mumbai for antibacterial activity test.
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Patel, H., Joshi, J. Green and chemical approach for synthesis of Ag2O nanoparticles and their antimicrobial activity. J Sol-Gel Sci Technol 105, 814–826 (2023). https://doi.org/10.1007/s10971-023-06036-7
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DOI: https://doi.org/10.1007/s10971-023-06036-7