| 학회 |
한국화학공학회 |
| 학술대회 |
2007년 가을 (10/26 ~ 10/27, 한국과학기술원) |
| 권호 |
13권 2호, p.1940 |
| 발표분야 |
에너지/환경 |
| 제목 |
Study of Dual Bed System for Photocatalytic Water Splitting Reaction |
| 초록 |
The dual bed system combines an efficient hydrogen producing photocatalyst with an oxygen producing photocatalyst by an electron shuttling redox couple. For electron shuttling redox couple, the soluble redox ion pairs are employed such as Sn4+/Sn2+, I-/IO3- or Fe2+/Fe3+. For oxygen producing photocatalyst, WO3 and BiVO4 are employed and WO3 did not evolve oxygen with Sn4+/Sn2+ redox couple as the conduction band of WO3 was more positive than the reduction potential of Sn4+/Sn2+ redox. For hydrogen producing photocatalyst, Rh doped SrTiO3 was employed and the more negative redox potential was, the more amounts of hydrogen were produced. As the potential of valence band of Rh doped SrTiO3 is more positive than the potential of oxidation of water, hydrogen producing reaction was inhibited by the small amounts of electron acceptors. For ideal operation of dual bed system, the valence band of hydrogen producing photocatalyst must be more negative than oxidation potential of water and the conduction band of oxygen producing photocatalyst must be more negative than reduction potential of redox couple. |
| 저자 |
홍석준, 배상원, 장점석, 지상민, 전휘찬, 이재성
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| 소속 |
포항공과대 |
| 키워드 |
photocatalysis; dual bed system; redox
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| E-Mail |
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| 원문파일 |
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