A New Observation on the Phase Transformation of TiO₂ Nanoparticles Produced by a CVD Method

Figures & data

FIG. 1 Schematic diagram of the experimental system.

FIG. 2 TEM images of TiO₂ nanoparticles prepared by the thermal decomposition of TTIP under various precursor concentrations. Change in primary particle diameter and geometric mean diameter obtained from TEM images with precursor concentration.

FIG. 3 Change in particle size distributions as a function of TTIP precursor concentration obtained from DMA/CNC system.

FIG. 4 X-ray diffraction pattern of titania nanoparticles under various precursor concentrations (source gas: TTIP).

FIG. 5 TEM images of TiO₂ nanoparticles prepared by the thermal decomposition of TTIP under various total flow rates. Change in primary particle diameter and geometric mean diameter obtained from TEM images with total flow rates.

FIG. 6 X-ray diffraction pattern of titania nanoparticles under various total flow rates (source gas: TTIP).

FIG. 7 TEM images of TiO₂ nanoparticles prepared by the oxidation of TiCl₄ under various precursor concentrations. Change in primary particle diameter and geometric mean diameter obtained from TEM images with precursor concentration.

FIG. 8 X-ray diffraction pattern of titania nanoparticles under various total flow rates (source gas: TiCl₄).

FIG. 9 TG-DTA curves of titania nanoparticles prepared by the thermal decomposition of TTIP (a) and the oxidation of TiCl₄ (b) at various precursor concentrations.