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  • 03월 02일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제109회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Titanium-embedded layered double hydroxides as highly effcient water oxidation photocatalysts under visible light

2012년 2월 23일 16시 34분 27초
POLY1-8 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
목 12시 : 05분
고분자화학 - Current issues in environment/energy fusion technologies
저자 및
KAIST 신소재공학과, Korea
Here, we have synthesized the new titanium-embedded layered double hydroxides (LDHs), such as (Ni/ Ti)LDH and (Cu/Ti)LDH. First of all, the formation of LDH structures and the bonding nature for a mixed oxide structure of LDHs are explored in this work. Also, it is determined that our LDHs show two absorption bands in the red and blue regions under visible light, thus different from those of a pure titanium oxide with absorption bands in only the UV region. We ?nd that the (Ni/Ti)LDH with the high surface area showed a higher reaction rate, producing 49 mmol O2 in water oxidation by using 200 mg of the photocatalyst and 1 mmol of AgNO3 as a sacri?cial agent. Also, the (Cu/Ti)LDH showed a good reaction rate and produced 31 mmol of O2 under the same condition. On the other hand, conventional TiO2 nanoparticles generated a very small amount of oxygen within the error range under this visible light irradiation. Consequently, these results imply that absorption bands in the visible range and the large surface area of an LDH could result in the high water oxidation photocatalytic activity under visible light.