Comparative assessment of antimicrobial efficiency of ionic silver, silver monoxide and metallic silver nanoparticles incorporated onto an aluminum oxide nanopowder carrier
Agnieszka Jastrzębska , Ewa Karwowska , Antoni Kunicki , Andrzej Olszyna
AbstractThe present paper provides comparative assessment of antimicrobial efficiency of ionic silver (Ag+), silver monoxide (Ag2O) and metallic silver (Ag) incorporated onto an aluminum oxide nanopowder carrier (Al2O3). The deposition of Ag+ ions, Ag2O nanoparticles as well as Ag nanoparticles on an different phases of aluminum oxide nanopowder carrier was realized using consecutive stages of dry sol-gel method. The Al2O3-Ag+; Al2O3-Ag2O and Al2O3-Ag nanopowders were widely characterized qualitatively and quantitatively by SEM, physical nitrogen sorption and XRD analyses. Results indicate that, the Al2O3 nanopowders added with Ag+, Ag2O and Ag, apart from phase composition, weren’t differing considerably from one another in terms of their morphology and physical properties. However, nanopowders of Al2O3-Ag were more agglomerated than Al2O3-Ag2O and Al2O3-Ag+ nanopowders. The antibacterial activity of the nanopowders was examined by the spread plate method using bacterial strains such as: Escherichia coli, Sarcina lutea and Bacillus subtilis. The best antibacterial properties against Sarcina lutea strain were achieved in the amorphous-Al2O3-Ag+ and Al2O3-Ag2O nanopowders, whereas the worst antimicrobial activity against Bacillus subtilis and Escherichia coli was shown by the Al2O3-Ag+ and Al2O3-Ag nanopowders. The observed increase of the antibacterial activity as the silver content was not however significant for Al2O3-Ag nanopowders. The results obtained in the present experiments show that the Al2O3-Ag+, Al2O3-Ag2O and Al2O3-Ag nanopowders, possessing good bactericidal properties, can be produced by using consecutive stages of dry sol-gel method and Al2O3 nanopowder added with Ag2O is considered as the best raw material in the production of antiseptic materials.
|Journal series||Journal of Nanoscience , ISSN 2314-6931, [2356-749X]|
|Publication size in sheets||0.55|
|Keywords in English||nanoalumina; ionic silver, nanosilver; nanoparticles; silver nanoparticles, nanopowder; antimicrobial properties, dry sol-gel method|
|Score|| = 0.0, 05-09-2019, ArticleFromJournal|
= 5.0, 05-09-2019, ArticleFromJournal
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