| 초록 |
Crystalline titanium dioxide (TiO2) is one of the most important wide band gap semiconducting materials and is widely investigated for use in photoelectrolysis, photocatalysis, heterojunction solar cells, environmental purification, and gas sensing. Especially, the TiO2 materials have been also attracted much attention as sun-screening materials in cosmetics, due to the excellent UV-light blocking (or absorbing). In the present work, we have synthesized mesoporous TiO2 with crystalline framework and high surface areas. In order to enhance the UV-light blocking property, various kinds of metal oxides have been loaded within the mesopores of TiO2 materials. The physicochemical properties of TiO2-based composite materials thus obtained have been investigated by using X-ray diffraction technique, N2 adsorption-desorption analysis, scanning electron microscope, transmission electron microscope, and UV-visible spectroscopy. Metal oxides loaded mesoporous TiO2 materials exhibit higher UV-light blocking effect than the TiO2 materials without other metal oxides, which is probably due to increase of reflective index and enhancement of UV/VIS absorption properties. |
