抄録
TiO2-SiO2 nano-hybrid particles were prepared by the sol-gel method. TiO2 nano-layer was nano-coated on the surface of SiO2 mono dispersed nano-particles. In this study, we changed the [CH3COOH]/[Ti] (RA) and [H2O]/[Ti] (Rw) to control the hydrolysis and following condensation rate of titanium alkoxide to coat the SiO2 nano-particles uniformly. In addition, the different hydrolysis conditions were applied to deposit the TiO2 nano-layer on the SiO2 nano-particles (Step wise hydrolysis method and One step hydrolysis method). The resultant TiO2-SiO2 hybrid sol was evaluated by measuring the particle size distribution using the dynamic light scattering method to determine the thickness of TiO2 layer on the SiO2 surface. The surface morphology and the crystal structure of the calcined nano-hybrid particles were observed by high resolution transmission electron microscope (HR-TEM) and X-ray Diffraction (XRD).
