| 학회 |
한국화학공학회 |
| 학술대회 |
2004년 봄 (04/23 ~ 04/24, 공주대학교) |
| 권호 |
10권 1호, p.570 |
| 발표분야 |
에너지/환경 |
| 제목 |
Prepatation of N-doped Strontium niobium oxide for the photocatalytic water splitting |
| 초록 |
A layered perovskite Sr2Nb2O7 was reported to be an efficient photocatalyst for water splitting under UV light irradiation. Nitrogen doping turned this material into a photocatalyst active for water splitting under visible light irradiation (>400 nm). Sr2Nb2O7-xNx catalysts were synthesized from a Sr2Nb2O7 precursor at 973 ~ 1273 K for 3 hr under NH3 flow (100 sccm). The catalyst obtained by nitriding Sr2Nb2O7 at 1073 K for 3 hr had the highest activity under visible light irradiation. Amount of a doped nitrogen increased as nitridation temperature increased. An excess N-doping induced the collapse of the layered structure of parent oxide. The obtained new crystal structure, SrNbO2N (oxynitride) was less active as photocatalyst for water splitting under visible light irradiation. This the optimum structure of the catalyst showing the maximum hydrogen production rate was the one that maintaining the layered structure of Sr2Nb2O7, with a part of its oxygen was replaced with nitrogen. |
| 저자 |
지상민, 김현규, 장점석, 배상원, 이재성
|
| 소속 |
포항공과대 |
| 키워드 |
Photocatalyst; Hydrogen; Oxynitride
|
| E-Mail |
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| 원문파일 |
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