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Vol.42, No.11, 918 ~ 923, 2004
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| Title |
| Photocatalytic Behaviors of Nanocrystalline Cu-doped TiO2 Synthesized by Mechanical Alloying |
| 박하성 Ha Sung Park , 김동현 Dong Hyun Kim , 김선재 Sun Jae Kim , 이경섭 Kyung Sub Lee |
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| 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) |
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| Key Words |
| Titanium dioxide, Mechanical allying, Copper doped, Nano-size |
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