Heterostructured Nanocomposites of Ag Doped Fe3O4 Embedded in ZnO for Antibacterial Applications and Catalytic Conversion of Hazardous Wastes

Heterostructured ternary nanocomposites of silver doped magnetites with ZnO (Z), namely Ag/ZnO (AZ), Ag/Fe 3 O 4 (AF), ZnO/Fe 3 O 4 (ZF) and Ag/ZnO/Fe 3 O 4 (AZF) were synthesized. X-ray diffraction studies indicated the formation of wurtzite hexagonal phase for ZnO, cubic structure for Fe 3 O 4 and...

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Bibliographic Details
Published in:Journal of inorganic and organometallic polymers and materials 2020-06, Vol.30 (6), p.1944-1955
Main Authors: Babu, Avis Tresa, Sebastian, Meera, Manaf, O., Antony, Rosy
Format: Article
Language:English
Subjects:
Aminophenol
Catalytic activity
Catalytic converters
Chemistry
Chemistry and Materials Science
Coliforms
Degradation
E coli
Face centered cubic lattice
Field emission microscopy
Gram-positive bacteria
Hazardous wastes
Hexagonal phase
Inorganic Chemistry
Iron oxides
Malachite green
Methylene blue
Nanocomposites
Nanoparticles
Nitrophenol
Organic Chemistry
Photoluminescence
Polymer Sciences
Silver
Stability analysis
Synergistic effect
Thermal stability
Thermogravimetric analysis
Ultraviolet radiation
Wurtzite
Zinc oxide
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Summary:Heterostructured ternary nanocomposites of silver doped magnetites with ZnO (Z), namely Ag/ZnO (AZ), Ag/Fe 3 O 4 (AF), ZnO/Fe 3 O 4 (ZF) and Ag/ZnO/Fe 3 O 4 (AZF) were synthesized. X-ray diffraction studies indicated the formation of wurtzite hexagonal phase for ZnO, cubic structure for Fe 3 O 4 and FCC structure for silver nanocomposites. Field emission scanning electron microscopy revealed the uniform distribution of granules of AZF. Fourier transform infrared spectroscopic studies confirmed the presence of M–O bonds. The ultra violet-visible diffuse reflectance spectroscopy and photoluminescence studies indicated the higher photo degradation activity of silver doped nanocomposites. Thermogravimetric analysis point towards the enhanced thermal stability of doped and coupled nanocomposites. Hydrogenation of 4-nitrophenol to 4-aminophenol showed that AZ, AF & AZF completed the reaction within 3, 4 & 2 min respectively while Z and ZF are ineffective. The photo catalytic activity of the nano composites was investigated by studying the degradation of malachite green (MG) & methylene blue (MB) under UV irradiation. Hetero structured and Ag doped nano composites exhibited better degradation efficiency of MG & MB. Using well diffusion method antibacterial activity of the as-prepared nanoparticles was tested against gram-positive bacteria Staphylococus aureus and gram negative bacteria Escherichia coli . AF & AZF nanocomposites exhibited strong antibacterial activity with greater inhibition zones due to the synergistic effect of silver and magnetite nanoparticles. Graphic Abstract
ISSN:1574-1443
1574-1451
DOI:10.1007/s10904-019-01366-y