| 초록 |
Titania sols were prepared by hydrolysis of a TiCl4 precursor instead of titanium alkoxides. As-prepared sol were characterized by X-ray diffraction(XRD), Fourier transform infrared spectroscope(FT-IR), Electron microscope(SEM), UV-VIS spectrophotometer(UV/VIS DRS) etc. The titania sols were modified with transition metals to prepare a series of modified catalysts, which were used for the photocatalytic oxidation of Methylene blue(MB) by PCC(Ⅱ) . They showed different photocatalytic activities due to the influence of the additives. The increased activity was partly due to higher surface area and porosity or smaller crystallite size. |
