Journal of the Korean Industrial and Engineering Chemistry, Vol.14, No.8, 1081-1085, December, 2003
나노결정 구조 티타니아의 Raman 분광 분석과 밴드갭
Raman Spectroscopic Analysis and Band Gap of Titania with Nanocrystalline Structure
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초록
플라즈마에 의해 제조된 나노 결정 구조의 티타니아에 대하여 Raman 분광 분석과 밴드갭의 특성을 알아보았다. 플라즈마에 의해 제조된 분말은 Ti(OBu)x(Ac)y 화합물로서 열처리한 분말을 Raman 분광 분석을 수행한 결과 193, 394, 513, 634 cm-1에서 아나타제를, 233, 443, 609 cm-1에서 루틸을 확인할 수 있었다. 분말의 밴드갭은 무정형 분말이 약 2.2 eV이었고, 아나타제는 3.0 ~ 3.8 eV의 값을 가졌다. 또한 루틸과 루틸·아나타제 혼용된 경우 약 2.6 eV 이었으며, 출력에 따른 영향이 낮은 것으로 확인되었다.
The vibrational characteristics and band gap properties of the nano-crystalline titania, which was prepared by plasma synthesis, were investigated using Raman spectroscopy. Ti(OBu)x(Ac)y was produced, and the characteristics vibrational peaks of tis anatase and rutile forms were observed at 193, 394, 513, 634 cm-1 and 223, 443, 609 cm-1, respectively. The band gap of amorphous powder and anatase forms were 2.2 and 3.0 ~ 3.8 eV, respectively. In the case of the mixed rutile and anatase form, the band gap was observed to be 2.6 eV.
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