We demonstrate the electrochromic properties of TiO2 nanotubes prepared by an anodization process and investigate the effects of heat treatment and viologen incorporation on them. The morphology and crystal structure of anodized TiO2 nanotubes are investigated by scanning electron microscopy and X-ray diffraction. As-formed TiO2 nanotubes have straight tubular layers with an amorphous structure. As the annealing temperature increases, the anodized TiO2 nanotubes are converted to the anatase and rutile phases with some cracks on the tube surface and irregular morphology. Electrochemical results reveal that amorphous TiO2 nanotubes annealed at 150°C have the largest oxidation/ reduction current, which leads to the best electrochromic performance during the coloring/bleaching process. Viologenanchored TiO2 nanotubes show superior electrochromic properties compared to pristine TiO2 nanotubes, which indicates that the incorporation of a viologen can be an effective way to enhance the electrochromic properties of TiO2 nanotubes.

1. 서 론
 2. 실험방법
  2.1. 양극산화에 의한 TiO2 나노튜브 제조 및 바이올로젠도입
  2.2. TiO2 나노튜브의 구조 분석 및 전기변색 특성 평가
 3. 결과 및 고찰
 4. 결 론
 감사의 글
 References

• 차형철(한국기술교육대학교 에너지신소재화학공학부, 창의융합공학협동과정) | Hyeongcheol Cha
• 나윤채(한국기술교육대학교 에너지신소재화학공학부, 창의융합공학협동과정) | Yoon-Chae Nah Corresponding Author