Preparation of nano-crystalline TiO2 by Sol-gel method using titanium tetraisopropoxide (TTIP) as a precursor

Abstract

A sol-gel procedure for producing nano-sized T iO2 from organometallic precursor -titanium tetraisopropoxide (TTIP), is presented. The characteristic pro- cesses and transformations were determined by means of TGA/DTA method. The crystalline structure of the prepared T iO2 samples was analyzed by means of Raman spectroscopy and XRD method. The size of the crystallites was determined by means of XRD analysis using the Scherrer’s equation. In the temperature interval from 250 to 650oC the anatase crystalline structure is stable, while at 650oC the presence of anatase and rutile crystal structures was detected. Increasing the temperature influences the increase of the size of the crystalline particles from 6 nm at 250oC, to more than 100 nm at 800oC.