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제112회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Highly Efficient Visible Light-Active Photocatalysts: A Linker Mediated Mesoporous Nanohybrids of CdS and Zn-Cr-Layered Double Hydroxide

등록일
2013년 8월 29일 17시 00분 09초
접수번호
1199
발표코드
MAT.P-1083 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 16일 (수요일) 16:00~19:00
발표형식
포스터
발표분야
재료화학
저자 및
공동저자
이장미, Gunjakar Jayavant Laxman1, 황성주1,*
이화여자대학교 화학나노과학부, Korea
1이화여자대학교 화학·나노과학과, Korea
We are successful in hybridizing isocharged nanospecies of cationic CdS quantum dots (QD) and cationic Zn-Cr-layered double hydroxide (Zn-Cr-LDH) nanosheets using inorganic anion as a linker. Powder X-ray diffraction and X-ray absorption spectroscopy clearly demonstrate the maintenance of the original crystal structures of Zn-Cr-LDH and CdS upon hybridization. A strong electronic coupling between the two components is evidenced by diffuse reflectance UV-vis spectroscopy and photoluminescence spectroscopy. The present nanohybrids display high efficient photocatalytic activity for visible light-induced H2 production (~2.1 mmol/h·g), which is much superior to that of the pristine CdS (~0.3 mmol/h·g). The observed improvement of photocatalytic activity is attributable to the depression of electron―hole recombination in the CdS QD via the strong coupling between the two components. The present findings underscore not only the usefulness of the CdS-Zn-Cr-LDH nanohybrids as efficient photocatalyst for H2 production but also the effectiveness of the anionic linker in hybridizing two kinds of isocharged nanomaterials.

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