Characterization and Mechanism Elucidation of Nano-TiO Composites Prepared by Gaseous Detonation Method.

In this study, a series of nano-TiO composite materials, including nano-TiO, nano-SnO/TiO, nano-SiO/TiO, and nano-FeO/TiO, were successfully synthesized via the gaseous detonation method. Comprehensive characterization of the synthesized samples was carried out through X-ray diffraction (XRD), transmission electron microscopy/high-resolution TEM (TEM/HRTEM), scanning electron microscopy/energy-dispersive X-ray spectroscopy (SEM/EDS), Brunauer-Emmett-Teller (BET) method, and Fourier transform infrared (FTIR) analysis, which unveiled the significant influence of precursor types on the microstructure of the composite materials. Specifically, the incorporation of Sn promoted the transformation of TiO to the rutile phase, reducing particle sizes from 25 to 19 nm and increasing the specific surface area from 44 to 86 m/g. In contrast, the introduction of SiO impeded the rutile phase formation, leading to a marked reduction in particle size to 14 nm and an enhancement of the specific surface area to 104 m/g. Furthermore, the presence of Fe promoted the formation of the rutile phase and enabled particle growth to 44 nm. These findings not only deepen the understanding of structural control in the synthesis of nano-TiO composite materials via the gaseous detonation method but also highlight the critical role of precursor selection in determining the properties of the resulting materials.