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Characterization and Photocatalytic and Antibacterial Properties of Ag- and TiO x -Based (x = 2, 3) Composite Nanomaterials under UV Irradiation.

Characterization and Photocatalytic and Antibacterial Properties of Ag- and TiO x -Based (x = 2, 3) Composite Nanomaterials under UV Irradiation.

Authors :
Morante, Nicola
Folliero, Veronica
Dell'Annunziata, Federica
Capuano, Nicoletta
Mancuso, Antonietta
Monzillo, Katia
Galdiero, Massimiliano
Sannino, Diana
Franci, Gianluigi
Source :
Materials (1996-1944). May2024, Vol. 17 Issue 10, p2178. 25p.
Publication Year :
2024

Abstract

Metal and metal oxide nanostructured materials have been chemically and physically characterized and tested concerning methylene blue (MB) photoremoval and UV antibacterial activity against Escherichia coli and Staphylococcus aureus. In detail, silver nanoparticles and commercial BaTiO3 nanoparticles were modified to obtain nanocomposites through sonicated sol–gel TiO2 synthesis and the photodeposition of Ag nanoparticles, respectively. The characterization results of pristine nanomaterials and synthetized photocatalysts revealed significant differences in specific surface area (SSA), the presence of impurities in commercial Ag nanoparticles, an anatase phase with brookite traces for TiO2-based nanomaterials, and a mixed cubic–tetragonal phase for BaTiO3. Silver nanoparticles exhibited superior antibacterial activity at different dosages; however, they were inactive in the photoremoval of the dye. The silver–TiOx nanocomposite demonstrated an activity in the UV photodegradation of MB and UV inhibition of bacterial growth. Specifically, TiO2/AgNP (30–50 nm) reduced growth by 487.5 and 1.1 × 103 times for Escherichia coli and Staphylococcus aureus, respectively, at a dose of 500 μg/mL under UV irradiation. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
19961944
Volume :
17
Issue :
10
Database :
Academic Search Index
Journal :
Materials (1996-1944)
Publication Type :
Academic Journal
Accession number :
177489414
Full Text :
https://doi.org/10.3390/ma17102178