The effect of preparation method on the properties of titanium dioxide nanoparticles used as a dielectric material

4^th International Conference and Exhibition on Materials Science & Engineering

September 14-16, 2015 Orlando, USA

Davoud Dastan and N B Chaure

Savitribai Phule Pune University, India

ScientificTracks Abstracts-Workshop: J Material Sci Eng

Abstract :

The properties of materials strongly depend on the preparation technique. Titania nanoparticles (NP�s) have been prepared using various surfactants such as Acetic Acid (AA), Oleic Acid (OA), Oley amine (OM), and a mixture of (OA+OM) by two different techniques, sol-gel and solvothermal methods. The solution was under vigorous stirring, and then the resultant suspension was transformed into a teflon-line autoclave and reacted at 180oC for 24 hours in solvothermal method to obtain the mono-dispersed titania NP�s which was dried at room temperature. TiO2 powder was collected after several times centrifugation with ethanol. Titania NP�s were annealed at 550 and 950oC for 18 and 24 hours respectively. The structural, optical, and morphological features of TiO2 NP�s were evaluated by means of X-ray diffraction (XRD), Raman spectroscopy, ultraviolet visible (UV-vis.) Photoluminescence spectroscopy, Field Emission Scanning Electron Microscopy (FESEM), and Transmission Electron Microscopy (TEM). Titania NP�s prepared using both methods showed anatase and rutile phases for samples annealed at 550 and 950oC whereas as prepared samples exhibited amorphous nature in case of sol-gel route and illustrated a pure anatase phase in case of solvothermal technique. The results of XRD were further confirmed by Raman spectroscopy, TEM, and FESEM. The crystallite size was almost 8-15 nm and 250- 300 nm, for as prepared and annealed at 550 and 950oC samples grown by solvothermal and sol-gel routes respectively. UV-visible corroborates the energy band 3.26, 3.04 and 2.94 eV for as-prepared and sintered at 550 and 950oC TiO2 NP�s.

Biography :

Davoud Dastan has completed his MSc degree from University of Pune with a first class grade and is currently a PhD student at Savitribai Phule Pune University. He has published more than 10 papers in reputed journals.

Email: d.dastan61@yahoo.com