Phase Transformation, Micro-structure, Crystal Growth Kinetics of Fe3+-Doped Titanium Dioxide Prepared by TiCl4 Hydrolyzation

Abstract

Titania based ceramics are promising materials for environmental sensors, high efficiency photocatalyst. Ion doping is an effective method to improve the properties by modifying their microstructure and phase composition. In this study, pure TiO₂, co-precipitation Fe³⁺-doped TiO₂ and step-precipitation Fe³⁺-doped TiO₂ are synthesized by means of TiCl₄ hydrolyzation. Thermal analysis, TEM and X-ray diffraction are used to characterize the Fe³⁺-doped TiO₂ powder. Micro-strain, crystallite size, phase content and cell parameters are calculated according to rietveld refinement software GSAS. The interaction mechanism of Fe³⁺ in crystal lattice of titanium dioxide and the crystal growth kinetics Fe³⁺-doped TiO₂ are intensively investigated.