| 학회 |
한국화학공학회 |
| 학술대회 |
2006년 가을 (10/27 ~ 10/28, 고려대학교) |
| 권호 |
12권 2호, p.2579 |
| 발표분야 |
촉매 및 반응공학 |
| 제목 |
Photocatalytic activity of Ti1-xMxO2 (M = Co and Cr) crystals |
| 초록 |
Metal-doped TiO2 nanoparticles were prepared by the sol-gel and hydrothermal synthesis methods. The estimated quantum yields (QYs) of Pt/Cr-doped TiO2 nanoparticles was ca. 0.3 %. Cr- , Co- and N-doped TiO2 showed the photocatalytic activity for IPA degradation to CO2, but only Cr-doped TiO2 produced H2 photocatalytically in the presence of methanol-water aqueous solution under visible light ( ＞ 420nm). Thus, in the case of Pt/Co-doped TiO2, the electron excited to the conduction band has a sufficient reduction potential to reduce H+ ion, but hole in the valence band has lower oxidation potential than required for CH3OH degradation to CO2. Therefore, Cr- , Co- and N-doped TiO2 show the different activity for the photocatalytic reaction of gases and solution phases. The results of the calculated electronic structure and experimental optical properties are correlated to schematically to describe the possible mechanism of the photocatalytic behavior of the system under study. |
| 저자 |
김현규1, 정의덕1, 김해진1, 홍경수1, 박혁규1, 홍석준2, 배상원2, 지상민2, 장점석2, 이재성2
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| 소속 |
1한국기초과학지원(연), 2포항공과대 |
| 키워드 |
TiO2; 광촉매
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| E-Mail |
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| 원문파일 |
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