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 |
Externí odkaz: |