Microwave-assisted polycrystalline Ag/AgO/AgCl nanocomposites synthesis using banana corm (rhizome of Musa sp.) extract: Characterization and antimicrobial studies

The rapid emergence of multidrug-resistant microbes has turned into the main threat to public health worldwide. The preparation and application of nanomaterial-based antimicrobials have increased to address this problem with great significance. This study has investigated the bio-fabrication of polycrystalline Ag-NCs using BCE as a reducer and stabilizer under microwave irradiation. Ag-NCs formations were optimized using varying concentrations of BCE and silver acetate. The XRD confirmed the incidence of phases of nanostructured crystals of Ag/AgO/AgCl. The average crystallite sizes were calculated to be 22.19, 36.65, and 36.65 nm for Ag, AgO, and AgCl, respectively. SERS spectra revealed the vibrational modes of the Ag and Ag-O stretch bands. FTIR spectra have indicated the incidence of chemical fingerprints for Ag-NCs and BCE biomolecules. SEM and HR-TEM micrographs exhibited the almost spherical to the oval shape of-50 nm. SAED pattern attested to silver crystallinity in agreement with XRD analysis. The MIC values of the Ag-NCs against Escherichia coli, Staphylococcus aureus, Aspergillus brasiliensis, and Rhizopus stolonifer were observed to be 120, 60, 200, and 100 mg/ml, respectively. This study has demonstrated the facile method to prepare polycrystalline Ag-NCs with appropriate structural and morphological characteristics for antimicrobial applications. (c) 2021 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.

Automated summary

The rapid emergence of multidrug-resistant microbes has become a major threat to public health worldwide. The preparation and application of nanomaterial-based antimicrobials are of great significance in addressing this problem. This study investigated the bio-fabrication of polycrystalline Ag-NCs using BCE as a reducer and stabilizer under microwave irradiation. The study optimized the formation of Ag-NCs and analyzed their structural and morphological characteristics. The prepared Ag-NCs exhibited antimicrobial activity against various bacteria and fungi.