Electronic Band Structure and Photocatalytic Activity of M-Doped TiO2(M=Co and Fe)
Electronic Band Structure and Photocatalytic Activity of M-Doped TiO2(M=Co and Fe)
M. G. Ha(KBSI); H. G. Kim(KBSI); B. H. Shon(Hanseo Univ.); E. D. Jeong(KBSI); 박혁규(한국기초과학지원연구원); J. H. Jung(POSTECH); 이재성(포항공과대학교); M. S. Won(POSTECH); S. W. Bae(Pohang University of Science and Technology)
49권 III호, 675~679쪽
초록
Cobalt- or iron-doped TiO2 nanocrystals were fabricated by the hydrothermal synthesis method. The electronic structure and optical properties of the materials were studied by using XRD, UVDRS, and the FP-LAPW (Full-Potential Linearized Augmented Plane Wave) method. The bandgap energy of Co- and Fe-doped TiO2 obtained by FP-LAPW and UV-DRS was ca. 2.6 and 2.5 eV, respectively. These doped materials absorbed visible light and exhibited photocatalytic activity for oxidative decomposition of CH3Cl to CO2 under visible light irradiation ( > 420 nm). However, only Fe-doped TiO2 showed the activity for CH3Cl degradation to CO2, probably due to its higher oxidation potential, as the FP-LAPW calculation indicated.
Abstract
Cobalt- or iron-doped TiO2 nanocrystals were fabricated by the hydrothermal synthesis method. The electronic structure and optical properties of the materials were studied by using XRD, UVDRS, and the FP-LAPW (Full-Potential Linearized Augmented Plane Wave) method. The bandgap energy of Co- and Fe-doped TiO2 obtained by FP-LAPW and UV-DRS was ca. 2.6 and 2.5 eV, respectively. These doped materials absorbed visible light and exhibited photocatalytic activity for oxidative decomposition of CH3Cl to CO2 under visible light irradiation ( > 420 nm). However, only Fe-doped TiO2 showed the activity for CH3Cl degradation to CO2, probably due to its higher oxidation potential, as the FP-LAPW calculation indicated.
- 발행기관:
- 한국물리학회
- 분류:
- 물리학