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- Title
Ag-Decorated Iron Oxides-Silica Magnetic Nanocomposites with Antimicrobial and Photocatalytic Activity.
- Authors
Muşat, Viorica; Crintea, Lenuța; Anghel, Elena-Maria; Stănică, Nicolae; Atkinson, Irina; Culiţă, Daniela Cristina; Baroiu, Liliana; Țigău, Nicolae; Cantaragiu Ceoromila, Alina; Botezatu, Andreea-Veronica; Carp, Oana
- Abstract
Nanotechnology offers unlimited possibilities for creating effective hybrid materials, which combine functional performance in environment depollution and antimicrobial defense with a lack of toxicity, biocompatibility, biodegradability, and natural availability. This paper presents the silver effect on photocatalytic and antibacterial activities of double-coated iron oxide nanoparticles (NPs), Fe3O4@SiO2/ZnO-Ag. The structural, morphological, and textural information of the, core–shell iron oxides-based superparamagnetic nanoparticles (IOMNPs) decorated with 5% Ag by ultrasound-assisted synthesis were evaluated by scanning electron microscopy with energy dispersive spectroscopy (SEM-EDX), X-ray diffraction, Raman spectroscopy, and Brunauer–Emmett–Teller physisorption measurements. Although two synthesis temperatures of 95 and 80 °C were used for the co-precipitated iron oxide cores, the XRD patterns revealed the formation of a single magnetite, Fe3O4, phase. The sorption–photocatalytic activities under dark and UV irradiation encountered a maximum removal efficiency of the MB (90.47%) for the Fe3O4@SiO2/ZnO-Ag sample with iron oxide core obtained at 80 °C. The rate constant for the second-order kinetics was 0.0711 min−1 for 2 h, and the correlation coefficient R2 closed to unity. Two samples with Ag-decorated hybrid SiO2/ZnO shell and hierarchically interconnected porous structure with large surface area (328.8 and 342.5 m2g−1) exhibited the best disk diffusion antimicrobial activity against four microorganisms, especially gram-positive Staphylococcus aureus.
- Subjects
PHOTOCATALYSTS; IRON oxide nanoparticles; ANTI-infective agents; HYBRID materials; NANOCOMPOSITE materials; TRANSCRANIAL magnetic stimulation; IRON oxides; FERRIC oxide
- Publication
Nanomaterials (2079-4991), 2022, Vol 12, Issue 24, p4452
- ISSN
2079-4991
- Publication type
Article
- DOI
10.3390/nano12244452