Eggshell membrane-mediated V2O5/ZnO nanocomposite: synthesis, characterization, antibacterial activity, minimum inhibitory concentration, and its mechanism
Autor: | Dhinagaran Ganesan, Prashanna Suvaitha Sundara Selvam, Gandhi Shree Chinnadurai, Venkatachalam Kandan |
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Rok vydání: | 2020 |
Předmět: |
010302 applied physics
Nanocomposite Chemistry chemistry.chemical_element 02 engineering and technology General Chemistry Zinc 021001 nanoscience & nanotechnology 01 natural sciences chemistry.chemical_compound Ammonium metavanadate 0103 physical sciences General Materials Science Orthorhombic crystal system Eggshell membrane 0210 nano-technology Antibacterial activity Antibacterial agent Wurtzite crystal structure Nuclear chemistry |
Zdroj: | Applied Physics A. 126 |
ISSN: | 1432-0630 0947-8396 |
Popis: | The novel V2O5/ZnO nanocomposite, an antibacterial material, was synthesized through a simple, low-cost, and energy-saving approach. The eggshell membrane was used for the first time as a bio-template, reducing and stabilizing agent during this synthesis. Ammonium metavanadate and zinc nitrate hexahydrate (1:1) were the metal precursors. The synthesis involved soaking of an eggshell membrane with the metal solution at room temperature followed by the calcination. The as-prepared and synthesized V2O5/ZnO nanocomposite was characterized by thermal, spectroscopic, and microscopic techniques. Besides, this study determined the antibacterial activity (agar well-diffusion test) and minimum inhibition concentration (resazurin microdilution test) of V2O5/ZnO nanocomposite against Gram-positive bacteria (Staphylococcus aureus and Bacillus sp.) and Gram-negative bacteria (Escherichia coli, Klebsiella pneumonia, Pseudomonas aeruginosa, Salmonella enterica, and Vibrio sp.). The annealing temperature (550 °C) for V2O5/ZnO nanocomposite was determined by the TGA-DTA study. The XRD analysis of V2O5/ZnO nanocomposite revealed the formation of both the orthorhombic (V2O5) and hexagonal wurtzite (ZnO) structures with the crystallite size of 20 nm. The FT-IR spectrum indicated the stretching vibration of V=O and Zn–O at 925 and 473 cm−1, respectively. The Raman spectra also confirmed the formation of the orthorhombic and hexagonal wurtzite structure. From DRS UV–visible spectroscopy, the optical band-gap energy of V2O5/ZnO nanocomposite was equal to 2.05 eV. The HR-SEM study of V2O5/ZnO nanocomposite depicted large spheres as well as small particles. The EDX analysis established only vanadium (32.45 wt %), oxygen (57.06 wt %), and zinc (10.48 wt %). The zeta-potential analysis of V2O5/ZnO nanocomposite showed moderate stability with a negative value of − 42.9 mV. The study of antibacterial activity exhibited a high zone of inhibition (23 mm) against the Staphylococcus aureus and Bacillus sp. at 30 μg mL−1, and the minimum inhibition concentration (MIC) value was observed in Bacillus sp. at 0.49 μg mL−1. The V2O5/ZnO nanocomposite can be employed in biomedical applications as an antibacterial agent. |
Databáze: | OpenAIRE |
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