Preparation of nanosized rutile TiO2 from an aqueous peroxotitanate solution

Abstract

A new facile method for direct preparation of well-crystallized rutile TiO2 nanoparticles; without any ionic impurities was reported. The nanosized TiO2 was prepared by aging a peroxotitanate solution at 100 degrees C for 0-12 h, formed by reaction of H2O2 and titanium tetraisopropoxide (TTIP). The method involves hydrolysis of TTIP and simultaneous digestion of hydrolyzed precipitates, and hydrothermal treatment into crystalline phases. It was found that the TTIP/H2O2 molar ratio in the preparation of peroxotitanate as a precursor for TiO2 Was crucial in the formation of a rutile phase. Transmission electron microscope observation for sols showed rod-like shapes with average particle sizes of around 100 nm in the elongated direction