| 초록 |
The development of nanocrystalline photocatalytic materials is rapidly a growing field of science and technology. This fact relates to the unique physical and chemical properties of TiO2.TiO2 bears tremendous hope in tackling the environmental issues we are currently facing. For effective utilization of solar energy, development efforts towards enlarging the absorption scope of TiO2 emerge as an appealing challenge. Therefore, the development of new generation of photocatalyst is very important. There are many methods for preparation of visible light responsive photocatalyst such as doping of titania with metals and none metals. Recently, doping TiO2 with rare earth ions has also attracted much attention. Doping the impurity ion is known as one of the most effective ways to manipulate the internal properties of host material such as crystallite size and the crystalline structure. In this study, pure and cerium doped TiO2 was prepared by sol-gel method. The presence of cerium ions in titania matrix caused a significant absorption shift to the visible region compared to pure TiO2.Cerium doped anatase titania powders were prepared by sol-gel process, with ammonium (IV) nitrate and Titanium (IV) butoxide as the raw materials. The characteristics of anatase TiO2 and cerium doped TiO2 were investigated by XRD, DTA, FE-SEM and UV/Vis spectroscopy. Research results indicated that XRD data characteristic diffraction peaks of anatase phase and also showed that cerium phase was not observed. Moreover XRD and DTA results imply that the addition of cerium to titania modifies the mechanism of formation of the titania phases. |
