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  • 09월 08일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제116회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Novel Graphene Based Nano-photocatalysts Development and Application to Waste-water Remediation

등록일
2015년 9월 8일 07시 28분 17초
접수번호
1362
발표코드
PHYS3-5 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
금 16시 : 00분
발표형식
심포지엄
발표분야
물리화학 - Physical Chemistry in Low Dimensions
저자 및
공동저자
김태규
부산대학교 화학과, Korea
Rapid industrial growth with lack of proper pollution control measures is effectively leading to environmental damage by the release of organic and inorganic pollutants into the air and water resources. In particular, pollution of natural water is a significant health risk and continues to threaten both human quality of life and the eco-system. Drinking water contaminated with organic dye stuffs, which is likely to cause deadly diseases to human beings like cancers, is also quite common. To resolve this issue photocatalysis has been widely applied because of its potential for the degradation of organic-dye molecules present in waste-water into harmless substances. So far, numerous semiconductor photocatalysts, such as sulfides (ZnS, CuS, Bi2S3, etc.) and oxides (ZnO, TiO2, etc.), have been investigated as photocatalyst for the degradation of toxic organic pollutants in waste-water. However, individual semiconductor nanostructures have an inherent limitation to achieving high photocatalytic efficiency because the recombination of electron-hole pairs is faster than the surface redox reaction. In addition, nanosized materials are normally unstable, easily agglomerated, and difficult to recover after use. Among the many ways to resolve these problems, a novel controlled synthesis of nanocomposites, i.e., graphene coupled with different components, is one of promising methods of improving the photocatalytic performance. These are expected to be highly efficient photocatalysts with good photo stability, due to the formation of hierarchical electron transfer cascade channels among its components and it can suppress electron?hole recombination via delocalization of electrons through the π network, which ultimately enhances the photocatalytic performance. In view of this, we report facile synthesis of various nanocomposites like ZnS-Ag2S/RGO, ZnO-RGO/RuO2, AgI-RGO, AgI-RGO aerogels, CuI-RGO nanocomposites with superior photocatalytic properties. Our detailed structural, optical, and photocatalytic measurements demonstrated that the nanocomposite photocatalytic performance of synthesized nanocomposites is significantly higher than that of bare nanostructures. Overall, our presentation provides new insight into the synthesis of graphene based nanocomposites and the developed composites are highly active photocatalysts with stable cycling that can be exploited in environmentally friendly applications.

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