| 초록 |
TiO2 is outstanding photocatalyst because of its superior photoactivity, chemical stability, and reasonable price. But TiO2 has some defects like large band gap and fast electron/hole recombination. Composite structure is widely used method for solving these problems. WO3 is proper material to narrowing band gap and separating electron hole pairs. Many researchers studied about optimum amount of WO3 species but the optimum condition of composition was fewly reported. At this study, the suitable TiO2 precursor for making composite structure with WO3 was considered. We used three TiO2 precursors, titaniuim n-propoxide, titanium isopropoxide, and titanium n-butoxide. The WO3 precursor, tungsten isoproxpoide was fixed material. The samples were characterized by XRD, XPS, TEM, UV-Vis, and Solar simulator. |
