Iron(Ⅲ)-doped nanostructure TiO2-coated SiO2 (TiO2/SiO2) particles were prepared using the layer-by-layer as-sembly technique and their photocatalytic property was studied. TiO2 colloids were synthesized employing the sol-gel method with TiCl4 as a precursor. The samples were characterized by Fourier transform infrared spectroscopy (FTIR), SEM, EDS, XPS, and XRD. The experimental results show that TiO2 nanopowders on the surface of SiO2 particles are well distributed, the amount of TiO2 is increased with the adding of coating layers, the pure anatase-TiO2 coating layers are synthesized at 500°C, and the photocatalytic activity of Fe3+-doped TiO2/SiO2 is higher than that of undoped TiO2/SiO2.
By using a simply liquid phase method at a low temperature, rutile TiO 2 nanowhiskers were successfully prepared from TiCl 4 aqueous solution at 70 ℃ after aging for 11 d. The obtained TiO 2 nanowhiskers were characterized by means of TEM,HRTEM and XRD. The results show that the nanowhiskers are rutile crystals growing along c-axis direction with a length of 100150 nm and a diameter 68 nm. The simple fabrication method of TiO 2 nanowhiskers will promote practical application of 1D TiO 2.
