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Nanochemical Approach to the Development of Porous Visible Light Active Photocatalysts

등록일
2006년 2월 16일 10시 26분 21초
접수번호
0936
발표코드
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발표시간
금 11시 : 10분
발표형식
심포지엄
발표분야
공업화학/재료화학 - 공업/재료2. Syntheses & Applications of Nano Materials II
저자 및
공동저자
황성주
이화여자대학교 나노과학부,
We have synthesized successfully visible light active photocatalysts of porous MOx-Ti1.83O4 (M = Ni, Cr, etc) heterostructure on the basis of a nanochemical method of lattice engineering. According to XRD, FE-SEM, HR-TEM, and XAS analyses, layered titanate nanosheets and the nanosized metal oxide particles are well ordered in layer-by-layer way. N2 adsorption-desorption isotherm and diffuse UV-vis spectroscopic results clearly demonstrated that the present nanohybrids have a large surface area (~200-300 m2/g) and a narrow bandgap (~1.7-2.4 eV), which are ascribable to the formation of porous structure and a coupling of the wide bandgap titanate and the narrow bandgap metal oxide species, respectively. These nanohybrids show an enhanced photocatalytic activity to effectively decompose organic compounds under the irradiation of visible light (Lambda < 550 nm). The present results highlight that the present lattice engineering method can provide a very powerful way of developing novel heterostructured nanomaterials with efficient visible light driven photocatalytic activity.

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