| 초록 |
We have synthesized a carbon doped titanium oxide powder (C-TiO2), which shows a good photocatalytic activity under visible wavelength region, by mechanochemical (MC) and heating treatment. The MC operation is carried out by grinding TiO2 with ethanol (C2H5OH) as a carbon source in air, and subsequent heating is carried out at different temperatures in air. The prepared samples were examined by a series of analytical methods including X-ray diffraction, Thermo-gravimetrical mass spectroscopy, Fourier transform infrared spectroscopy, Specific surface area measurement, X-ray photoelectron spectroscopy (XPS), NOx gas decomposition and Ultraviolet-visible spectroscopy (UV-VIS). XPS analysis particularly illustrates the existence of C-Ti and C-O bindings, suggesting the improvement in photocatalytic ability in the visible light wave range. And the prolonged grinding operation results in decrease in particle size and increase in specific surface area. The effective grinding periods of time and temperature at heating are about 2hr and 200℃, respectively. |
