| 초록 |
The use of TiO2 as a photocatalyst is generally carried out in order to decompose toxic materials, air and water purification by elimination of toxic NOx from air and photocatalytic decomposition of toxic agents from polluted water, as well as for the development of self cleaning materials. However, the application of TiO2 has still some problems to be solved, such as its low specific surface area, low quantum yields and poor efficiency of photocatalytic reactions. TiO2 photocatalysts operate only under UV light of wavelengths shorter than 400 nm which means only 3-5 % of the solar light that reaches the earth can be utilized. Recently, many studies have been devoted to the modification of TiO2 photocatalysts by the substitutional doping of metals or nonmetals in order to extend their absorption edge into the visible light region and to improve their photocatalytic activity. In this study, microwave-assisted hydrothermal synthesis of highly vis-active Cu loaded nitrogen-doped TiO2 nanopowders, which can be applied to degrade methylene blue (MB), was investigated. TiO2 nanopowders were prepared, and confirmed by UV-Vis, XRD, BET, TEM, EPMA, TG-DTA. Furthermore, microwave-assisted photocatalytic degradation of methylene blue (MB) in aqueous solution was investigated. |
