Abstract
TiO2-based and Fe3O4-based nanocomposites are of interest as photocatalysts, materials for spintronics, sensors, etc. This paper presents a new approach to synthesize pseudobrookite crystallites which is based on sol–gel transformations and interaction of the multiphase colloidal system components and makes it possible to yield hydroxylated crystallites of a material that is identical to pseudobrookite according to XRD at near-room temperature without annealing stage. Using results of dynamic light scattering and low-temperature nitrogen adsorption–desorption the structural changes occurring upon the interaction of TiO2 and Fe3O4 nanoparticles in the synthesis process were studied. Comparison of the spectral characteristics of the nanocomposite consisting of titania (anatase) and magnetite in the visible and UV spectral regions showed a significant visible-region shift of the nanocomposite absorption bands compared to pure components.
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