Low Temperature Preparation of SrTiO3 Nanocrystalline by Hydrothermal Method

Abstract

A low temperature (90 ºC) hydrothermal method was proposed for the synthesis of SrTiO₃ nanoparticles. The characterization results from X-ray diffraction reveals that the resultant products are phase-pure perovskite structure. The SrTiO₃ nanoparticles synthesized in ³ 1.8 mol/L KOH solution and their crystallite size increases with increasing the reaction time and temperature. The infrared spectrum shows the characteristic absorption peaks of SrTiO₃ along with OH^– groups. UV-VIS absorption spectra indicate the band gap of SrTiO₃ nanoparticles is high than that of bulk SrTiO₃ and it exhibits an increasing trend with decreasing particle size.