Morphological Studies on TiO2 Nanotubes Formed by Anodizing in Aqueous and Non-Aqueous Solutions
수용액 및 비수용액에서 양극산화법으로 형성된 TiO2 나노튜브의 구조 연구
김병조;문성모;정용수;김병관;
Kim, Byung-Jo;Moon, Sung-Mo;Jeong, Yong-Soo;Kim, Byung-Kwan;
한국기계연구원 부설 재료연구소;창원대학교 화공시스템공학과;
Korea Institute of Materials Science;Department of Chemical Engineering, Changwon National University;
DOI : 10.5695/JKISE.2010.43.4.180
$TiO_2$ nanotubes were formed on Ti by anodizing in 1 M $H_3PO_4$ + 0.3 M HF and 0.1 M $NH_4F$ + 2% $H_2O$ in ethylene glycol, and their surface and cross-sectional morphologies were observed using FE-SEM as a function of anodizing time and applied voltage. The cross-section of the $TiO_2$ nanotubes was readily observed from the small pieces of nanotubes remaining near the scratch lines after scratching of the anodized surface. $TiO_2$ nanotubes was observed to grow faster and thicker in non-aqueous solution than in aqueous solution. Diameter of $TiO_2$ nanotubes was proportional to the applied voltage, irrespective of the type of the electrolyte, and it is recommended to use non-aqueous solutions for the preparation of larger diameter of $TiO_2$ nanotubes.
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