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  • 02월 22일 16시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

Au/TiO2 as a photoactive material for 1,4-dioxane photodegradation

등록일
2008년 2월 14일 11시 24분 17초
접수번호
1310
발표코드
29P75포 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
금 <발표Ⅴ>
발표형식
포스터
발표분야
물리화학
저자 및
공동저자
허정은, 윤나경1, 이태규2, 민병권3
연세대학교 화학공학과,
1한국과학기술연구원 청청에너지연구센터,
2연세대학교 화공생명공학과,
3한국과학기술연구원 청정에너지연구센터,
Gold nano-particles supported on a TiO2 have shown many interesting catalytic phenomena such as a strong size dependency on CO oxidation and an extremely high selectivity in propene oxidation. More interestingly, for various photocatalytic reactions Au nano-particles have shown to promote the photocatalytic activity due to several reasons including the field enhanced light absorption by surface plasmon resonance, the assistance to charge separation, and the role as a sensitizer. In order to elucidate more fundamental basis of Au/TiO2 as a photocatalyst we performed photocatalytic decomposition of 1,4-dioxane in water using various Au/TiO2 powders whose size and/or morphology were varied by leaching method. Particularly, we focused on the relationship between the intensity of surface plasmon absorption and photocatalytic activity. Our results show that typical Au state on TiO2 reveals two times higher activity compared to the commercial TiO2 photocatalyst (P25). More importantly, we found that the behavior of photocatalytic activity is strongly correlated with that of surface plasmon absorption of gold nano-particles.

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