Eco-friendly preparation of zinc oxide nanoparticles using Tabernaemontana divaricata and its photocatalytic and antimicrobial activity

Autor: Meenakshisundaram Swaminathan, S. Ashokkumar, K. Kaviyarasu, Chandra Prasad Khatiwada, R. Ganapathi Raman, R Pavithra Marthandam, A. Raja, J. Jayachandiran
Rok vydání: 2018
Předmět:
Staphylococcus aureus
Tabernaemontana
Tabernaemontana divaricata
Biophysics
Nanoparticle
chemistry.chemical_element
Metal Nanoparticles
02 engineering and technology
Zinc
Microbial Sensitivity Tests
010402 general chemistry
01 natural sciences
Catalysis
chemistry.chemical_compound
Microscopy
Electron
Transmission
X-Ray Diffraction
Spectroscopy
Fourier Transform Infrared
Escherichia coli
Radiology
Nuclear Medicine and imaging
Wurtzite crystal structure
Radiation
Aqueous solution
Photolysis
Radiological and Ultrasound Technology
biology
Plant Extracts
technology
industry
and agriculture
Green Chemistry Technology
021001 nanoscience & nanotechnology
biology.organism_classification
0104 chemical sciences
Anti-Bacterial Agents
Methylene Blue
chemistry
Salmonella paratyphi A
Thermogravimetry
Photocatalysis
Microscopy
Electron
Scanning
Sunlight
Zinc Oxide
0210 nano-technology
Antibacterial activity
Methylene blue
Nuclear chemistry
Zdroj: Journal of photochemistry and photobiology. B, Biology. 181
ISSN: 1873-2682
Popis: The present work reports the green synthesis of Zinc Oxide Nanoparticles (ZnO NPs) using aqueous Tabernaemontana divaricata green leaf extract. ZnO NPs have been characterized by X-ray diffraction (XRD), Ultra Violet–Visible (UV–Vis) studies, Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and Fourier Transform–Infra Red (FT–IR) analysis. XRD pattern analysis confirms the presence of pure hexagonal wurtzite crystalline structure of ZnO. The TEM images reveal the formation of spherical shape ZnO NPs with the sizes ranging from 20 to 50 nm. The FT–IR analysis suggests that the obtained ZnO NPs have been stabilized through the interactions of steroids, terpenoids, flavonoids, phenyl propanoids, phenolic acids and enzymes present in the leaf extract. Mechanism for the formation of ZnO NPs using Tabernaemontana divaricata as bioactive compound is proposed. As prepared ZnO NPs reveals antibacterial activity against three bacterial strains, Salmonella paratyphi, Escherichia coli and Staphylococcus aureus. The ZnO NPs shows higher antibacterial activity against S. aureus and E. coli and lesser antibacterial activity against S. paratyphi compared to the standard pharmaceutical formulation. Photocatalytic activity of synthesized ZnO NPs was analyzed for methylene blue (MB) dye degradation with sunlight. Almost complete degradation of dye occurred in 90 min. This nano-ZnO, prepared by eco-friendly method will be much useful for dye removal and bacterial decontamination.
Databáze: OpenAIRE
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