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열 산화를 이용한 TiO2 나노선의 성장에 미치는 O2/N2 가스비의 영향 KCI 등재 SCOPUS

Effect of the O2/N2 Ratio on the Growth of TiO2 Nanowires via Thermal Oxidation

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한국재료학회지 (Korean Journal of Materials Research)
한국재료학회 (Materials Research Society Of Korea)
초록

TiO2 nanowires were grown by thermal oxidation of TiO powder in an oxygen and nitrogen gas environment at 1000 oC. The ratio of O2 to N2 in an ambient gas was changed to investigate the effect of the gas ratio on the growth of TiO2 nanowires. The oxidation process was carried out at different O2/N2 ratios of 0/100, 25/75, 50/50 and 100/0. No nanowires were formed at O2/N2 ratios of less than 25/75. When the O2/N2 ratio was 50/50, nanowires started to form. As the gas ratio increased to 100/0, the diameter and length of the nanowires increased. The X-ray diffraction pattern showed that the nanowires were TiO2 with a rutile crystallographic structure. In the XRD pattern, no peaks from the anatase and brookite structures of TiO2 were observed. The diameter of the nanowires decreased along the growth direction, and no catalytic particles were detected at the tips of the nanowires which suggests that the nanowires were grown with a vapor-solid growth mechanism.

목차
1. 서 론
 2. 실험 방법
 3. 실험결과 및 고찰
 4. 결 론
 Acknowledgements
 References
저자
  • 이근형(동의대학교 신소재공학과) | Geun-Hyoung Lee Corresponding author