THE STRUCTURAL, MORPHOLOGICAL AND OPTICAL STUDY OF PURE AND W-DOPEDTiO2 NANO PARTICLES AND ITS APPLICATION TO ANTIMICROBIAL ACTIVITY
Journal Title: JOURNAL OF ADVANCES IN CHEMISTRY - Year 2017, Vol 13, Issue 3
Abstract
In this research work, the effect of Tungsten-doping on the crystal structure, morphology and antimicrobial of titanium dioxide nanoparticles were studied. The pure and different weight % of tungsten doped TiO2 nanoparticles were synthesized by sol–gel method and calcinated at 600°C for 5 hours. The synthesised products have been characterized by X-ray Diffraction studies (XRD), Field Emission Scanning Electron Microscopy (FE-SEM), Elemental analysis (EDXA), Ultra Violet Visible Spectroscopy (UV-Vis), Photoluminescence Spectra (PL), High Resolution Transmission Spectroscopy (HRTEM) and Fourier Transform Infra Red Spectroscopy (FT-IR). XRD pattern of pure TiO2 and 1 weight % W-doped TiO2nanoparticles confirms the anatase structure and increase in the W-doping changes the phase of TiO2 to rutile. Average crystallite size of synthesized nanoparticles was determined using the Debye–Scherrer formula. The crystallite size obtained for pure TiO2 is in the range from 29 nm to 39 nm and W-doped TiO2 is varied from 28 to 34 nm. The SEM images show the agglomerated particles of spherical-like morphology. Optical property and direct bandgap of pure and W-doped TiO2nanoparticles also further characterised by UV–Vis Spectroscopy. The images of HRTEM clearly confirm that particles present in the W-doped TiO2 powdered sample is nanosized particles. The Kirby Bauer Agar Well Diffusion Assay method was employed to explore antimicrobial activity of nanosized pure and W-doped TiO2 colloidal suspension against the test microorganisms two Gram positive bacteria(Staphylococcus aureus, Bacillus subtilis),two Gram negative Bacteria(Escherichia coli, Pseudomonas aeruginosa),and two fungi(Candida albicans, Aspergillus niger). It shows that the W- doped TiO2 nanoparticles inhibited the multiplication and growth of the above mentioned test bacteria and fungi. Antimicrobial activity was found against all tested microorganisms which confirmed that W-doped TiO2 nanoparticles possess high antimicrobial activity compared to pure TiO2 nanoparticles.
Authors and Affiliations
Manikandan Kandasamy
Keywords
Related Articles
- EP ID EP653133
- DOI 10.24297/jac.v13i3.6712
- Views 158
- Downloads 0
AN EXPERIMENTAL INVESTIGATION ON THERMAL PERFORMANCE OF NANOFLUIDS IN A MINICHANNEL HEAT SINK
In the present work, experimental investigation has been undertaken to analyze the heat transfer performance of nanofluids used as alternate coolant to conventional fluid in a cooper minichannel heat sink. Al₂O₃-wate...
The present status and prospect of research on the de-ironing and bleaching technology of kaolin
The increase of degree of whiteness is an important method for Kaolin growth in value. In this paper, the occurrence of iron in kaolin was briefly described, and the methods of the de-ironing and bleaching technology of...
The study of the effect of the concentration of propylene in the PPF to the liquid yield of the reaction
The results of the study of the effect of the concentration of propylene to propane-propylene fraction to a liquid yield of the reaction depending on the feed space velocity are presented.The results in the presence of a...
Ultrasonic-assisted ruthenium-catalyzed one-pot synthesis of biscoumarins
The Ru-grafted zeolite beta was found to be an excellent heterogeneous catalyst for one-pot synthesis of biscoumarins. This reaction was carried out under reflux condition and ultrasonic irradiation. On the other hand, t...
Mechanical Properties of Randomly Oriented Calotropis Gigantea Fiber-Reinforced Phenol Formaldehyde Biocomposites
Mechanical properties such as tensile, flexural and impact, of randomly oriented Calotropis Gigantea Fiber (CGF) -reinforced Phenol Formaldehyde (PF) biocomposites were studied based on the five different fiber loadings...