| 학회 |
한국재료학회 |
| 학술대회 |
2011년 봄 (05/26 ~ 05/27, 제주 휘닉스 아일랜드) |
| 권호 |
17권 1호 |
| 발표분야 |
C. Energy and the Environment Technology(에너지 및 환경재료) |
| 제목 |
Structural evolution and reduced bandgap of co-precipitated Ti1-xVxO2 nanoparticles |
| 초록 |
Mixed oxides of Ti1-xVxO2 (0 ≤ X ≤ 0.5) were produced by coprecipitation process using TiCl4 and VOCl 3 as starting materials. As-precipitated gels were calcined at 500 ~ 800 oC, either in vacuum or oxygen atmosphere. Effects of calcination atmosphere and temperature on the phase transition of crystalline Ti1-xVxO2 oxides were studied. Calcination in oxygen atmosphere does not produce mixed Ti1-xVxO2 oxides, but the mixtures of TiO2 and V2O5 oxides were formed for all the calcination temperatures. Calcinations at 800 oC in vacuum resulted in the formation of rutile Ti1-xVxO2 phase for all composition of vanadium. A significant portion of vanadium ions is incorporated into TiO2 lattice, which consistently decreases the lattice parameters of the rutile Ti1-xVxO2 phase as the vanadium addition increases. Consistent decrease of energy gap was obtained in the rutile Ti1-xVxO2 phase as the vanadium addition increases. |
| 저자 |
Hye Jin Kwon1, Joo Sin Lee1, Jucheol Park2, Min Woo Park3
|
| 소속 |
1Kyungsung Univ., 2Research Institute for Advanced Materials, 3Seoul National Univ. |
| 키워드 |
coprecipitation; calcination; bandgap; TiO2
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| E-Mail |
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