[Structural properties of TiO2 thin film modified by carbon black]

TiO2 photocatalytic film(CB-TiO2) modified by doping carbon black was prepared, and the some structural properties, such as specific surface area, phase, crystal grain size and excitation wavelength were gave, through liquid nitrogen adsorption, X-ray diffraction(XRD) and diffuse reflection spectrum(DRS). The results indicated that adsorbability of CB-TiO2 was greatly improved, BET specific surface area of which enhanced 50%-80% than that of TiO2, baked under 300 degrees C-500 degrees C. And CB modification reduced the crystal grain size, so the temperature of phase transformation was decreased. Corresponding, the photocatalytic activity of CB-TiO2 also was greatly improved, the reaction rate of which was 1.5 times of that of TiO2.