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제107회 대한화학회 학술발표회, 총회 및 기기전시회 Titanium Intercalated Layered Double Hydroxides as Highly Efficient Photocatalysts for Water Oxidation under Visible Light

2011년 2월 28일 13시 44분 20초
INOR2-5 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
금 11시 : 00분
무기화학 - Inorganic/Material Science in Energy Applications II
저자 및
KAIST 신소재공학과, Korea
Selective water oxidation through photocatalytic reaction under visible light irradiation is an important issue in the field of artificial photosynthesis. However, conventional photocatalysts are inefficient when considering the demands of practical application. In this work, we have synthesized a series of titanium intercalated layered double hydroxides (LDH) such as (Ni/Ti)LDH and (Cu/Ti)LDH and tested the compounds for visible light photocatalytic oxygen generation. To demonstrate the photocatalytic ability and the bonding nature of the mixed oxide structures that were prepared in this study, we have characterized them through PXRD, FT-IR, XPS, BET, UV-Vis spectroscopy, TEM and EDX analysis. The intercalation of titanium and the bonding nature of mixed oxide structure of LDHs are proved in this work. The two kinds of LDH show two absorption bands in the visible light area in the red and blue regions that are different from those of pure metal oxide. The more active material between the two LDHs is (Ni/Ti)LDH. The ability of (Ni/Ti)LDH for water oxidation with silver nitrate as sacrificial agent under visible light was found to be 49 ųmoles and that of (Cu/Ti)LDH was found to be 31 ųmoles under the same conditions