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제116회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Effective Control of the Crystal Growth and Photocatalyst Activity of Noble Metal Nanoparticles Using Inorganic Nanosheets as Substrates

등록일
2015년 9월 3일 16시 59분 44초
접수번호
1307
발표코드
MAT.P-485 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 16일 (금요일) 13:00~14:30
발표형식
포스터
발표분야
재료화학
저자 및
공동저자
서지윤, 김인영, 조윤경1, 황성주*
이화여자대학교 화학·나노과학과, Korea
1이화여자대학교 화학나노과학과, Korea
Highly dispersed metal nanoparticles on the surface of layered titanate are synthesized by the crystal growth of Au and Pt nanoparticles at the terminal oxygen atoms exposed on the surface of trititanate (Ti3O72-). To confirm the beneficial role of terminal atoms in dispersing metal nanoparticles, layered lepidocrocite titanate (Ti0.91O20.36-) which possesses flat surface with only the terminal oxygen atoms are also used as reference. According to size characterization using SEM and TEM analysis, the Au-trititanate nanocomposite shows more monomodal distribution and smaller size of Au nanoparticles than Au-lepidocrocite titanate. In Pt-titanate nanosheet, the similar results were obtained. The change of the bonding aspect between titanium and metal ions was analyzed by using XANES, FT-IR, and Raman spectra. The photocatalytic property of these nanocomposites materials was measured by reduction of carbon oxide gas and artificial photosynthesis of hydrocarbon by splitting water. The lepidocrocite titanate-based nanocomposite shows the better activity for the H2 generation than that of the trititanate-based nanocomposite, which is attributable to more effective electron transfer path of lepidocrocite titanate than that of trititanate. These researches demonstrate that the surface structure of metal oxide nanosheets controls the crystal growth of metal nanoparticles, and furthermore, regulates the photocatalytic effect.

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