| Title |
Photocatalytic Behaviors of Nanocrystalline Cu-doped TiO2 Synthesized by Mechanical Alloying |
| Authors |
박하성(Ha Sung Park); 김동현(Dong Hyun Kim); 김선재(Sun Jae Kim); 이경섭(Kyung Sub Lee) |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
Titanium dioxide; Mechanical allying; Copper doped; Nano-size |
| Abstract |
Nanocrystalline Cu-doped TiO₂ was synthesized by mechanical alloying (MA) to shift the absorption threshold into the visible light region. The synthesized powders were characterized by XRD, TEM and BET for structural analysis, UV-DRS and PL for the optical study and TOC for photocatalytic abilities. The Cu-doped powder had a rutile phase in which the added Cu atoms were uniformly distributed and had a large surface area. Optical studies showed that the absorption wavelength of Cu-doped powders moved to visible light range (red shift), which was believed to be induced by the Cu impurity energy level. The degradation rate of carbon concentration in Cu-doped powders was faster than pure that of TiO₂. (Received July 26, 2004) |