Synthesis, Characterization and Photocatalytic Activity of Anatase-Brookite- Rutile Composite TiO2 Nanocrystals Prepared in H2O/Alcohol System

Abstract

Anatase-brookite-rutile composite TiO₂ nanocrystals with a narrow particle size distribution and good dispersibility were prepared by a hydrothermal method using TiC1₄ as the starting material in different H₂O/alcohol system. TEM, HRTEM, X-ray diffraction, UV-VIS diffuse reflectance spectra and FT-IR were used to characterize the synthesized particles. The results showed that the presence of alcohol was the key factor which determined the phase content in prepared TiO₂. The prepared TiO₂ exhibited higher photocatalytic activity than P25 under UV light.