| 초록 |
Nano-sized titania is the most effective photocatalyst and has been widely applied in purification of water and air. Nano-size materials have attracted much attention because of interesting physical properties caused by their unusual sizes and shapes. To this end, a great deal of effort has been devoted to the synthesis of TiO2 nanotubes, nanorods, or nanowires. Of them, the hollow sphere structures certainly provide advantageous features, such as a high surface area, delivering ability, surface permeability and a low density. Hollow spheres have extensive applications in the fields of biology, catalysis, electronics, optics, photonic materials, medical analysis, coating, and so on. Inorganic (SiO2 beads, glass bubble) and organic (polystyrene (PS), poly methyl methacylate (PMMA) and copolymer beads) materials can be used as cores. In this study, TiO2-doped SiO2 hollow spheres were obtained by coating the SiO2 hollow sphere particles with appropriate amount of titanic chloride solution. The obtained nanoparticles were characterized using XRD, SEM, XPS and probe reaction. |
