| 초록 |
Titanium dioxide (TiO2) has got a great attention in various fields such as catalysis, dye-sensitized solar cells (DSSCs), photochromic devices, sensor, and cosmetics, due to its differentiated advantages from the others: high band gap energy, high stability and catalytic activity, and non-toxicity. The photocatalytic activity of TiO2 has been considered to be determined by the crystalline phase, crystal size, and specific surface area. To improve the photocatalyic activity of TiO2, small size and high crystallinity of nanoparticles have been used. Mesoporous TiO2 has a large surface area because of its high surface to volume ratio, and so it should in principle have high photochemical sterilization, because of the improved access to the active sites of TiO2. The active site of TiO2 was originated from surface hydroxyl groups. In this study, we prepared mesoporous TiO2 for the purpose of its usages by surface modification with hexamethyldisilazane. Here, we controlled the surface hydrophobicity from hydrophobic TiO2 surface in order to activate or deactivate the TiO2 surface. |
