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학술발표회초록보기

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제108회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Role of CNT in Photocatalytic Property of CNT-Embedded TiO2 Nanotube via Novel Fabrication Method

등록일
2011년 8월 1일 15시 46분 24초
접수번호
1287
발표코드
Ⅱ-MAT.P-297 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
목 <발표Ⅱ>
발표형식
포스터
발표분야
재료화학
저자 및
공동저자
박재현, 최홍수, 박종래
서울대학교 재료공학부, Korea
Titanium dioxide (TiO2) has excellent photocatalytic ability to use in environmental application such as dye-sensitized solar cell, self-cleaning glass, and gas sensing. However, its high band gap energy limits its usage only in UV range. Doping carbon nanotube (CNT) into TiO2 has been proposed for one of the strategies of reducing band gap energy to use TiO2 photocatalyst in visible light range. Furthermore, it was revealed that superior electrical conductivity of CNT retards the recombination of electron-hole pair of TiO2. As a result, CNT/TiO2 composite structures have been synthesized for various methods such as sol-gel method, hydrothermal method, and electrospinning. Those composites have a limit of loading TiO2 due to the fabrication methods are coating TiO2 particles on the dispersed CNTs. In addition, the structure of their final product is nanoparticle or nanofiber which has smaller surface area than nanotube. In this research, electrospinning and in situ sol-gel reaction are executed sequentially to make TiO2 nanotube embed CNTs. As well as its high surface area caused by the nanotube structure, this structure has more TiO2 than CNTs so that it is indeed the meaning of doping CNT into TiO2. Aligned CNTs in the TiO2 nanotube also perform a role of electron pathway. SEM, TEM, and XRD analysis was performed to confirm the morphology and crystal structure. UV-Vis spectroscopy, BET measurement was used to compare the photocatalytic performance of this material with commercial photocatalyst and TiO2 nanotube without CNT.

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