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학술발표회초록보기

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  • 03월 02일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제109회 대한화학회 학술발표회, 총회 및 기기전시회 안내 The Preparation Effect of Graphene/TiO2 composite for Photo(electro)catalytic Activity

등록일
2012년 2월 16일 18시 20분 13초
접수번호
1272
발표코드
ENVR.P-1343 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
4월 25일 (수요일) 18:00~21:00
발표형식
포스터
발표분야
환경에너지
저자 및
공동저자
김형일
포항공과대학교 환경공학부, Korea
The core/shell structure of the semiconductor and carbon material hybrids can be carefully designed for higher solar conversion efficiency. In this work, nano-sized graphene-coated TiO2 nanoparticles (r-NGOT) were successfully synthesized and compared with the typical graphene/TiO2 composite (r-LGOT) that has the particles-on-a-sheet geometry for photocatalytic and photoelectrochemical (PEC) activities. r-NGOT showed significantly enhanced activities in both hydrogen production and PEC tests compared to r-LGOT. All experimental evidences obtained in this work indicate that the addition of r-NGOs onto TiO2 NPs enhanced the photocatalytic and PEC activities, which can be attributed to the retarded charge recombination and the enhanced electron transfer on the surface of r-NGOT. The enhanced activities of r-NGOT in both photocatalytic and photoelectrocatalytic measurements are attributed to the unique core/shell structure of r-NGOT which has the larger contact area between r-NGO and TiO2 NPs and the closer contact between Pt and TiO2 compared with r-LGOT. The present core/shell geometry could serve as an effective design of graphene/TiO2 composite for solar conversion applications.

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