Preparation and Characterization of TiO2 Nanocrystals using Titanium Isopropoxide

Abstract

Titanium dioxide (TiO2) nanoparticles were prepared by hydrolysis of Titanium Isopropoxide (TTIP) and aqueous solution with constant pH and then peptizing the resultant suspension gel (White-Blue) and calcinations of the gel at various temperatures. Two samples prepared with different concentration of the water. The resultant powder has been examined by X-Ray diffraction (XRD), Scanning Electron Microscope (SEM), Energy Dispersive X-Ray Analysis (EDAX) and Photoluminescence (PL). It has been found that the powders calcinated at 100C are consist of anatase fine crystalline phase with a crystalline size of 14 nm to 15 nm. The resultant TiO2 nanocrystals are found to have uniform size and morphology. At 800C, calcinated powders are consist mixture of anatase and rutile phase in both the samples. A very fine network texture made from uniform nanoparticle has been confirmed by scanning electron microscope analysis. The composition of the presence of various elements in TiO2 nanocrystal has been studied by EDAX. The
photoluminescence emission spectra are taken at different excitation wavelength. It is observed that the emission spectra shift when the excitation wavelength is increased.