| 학회 | 한국화학공학회 |
| 학술대회 | 2005년 가을 (10/21 ~ 10/22, 인하대학교) |
| 권호 | 11권 2호, p.2142 |
| 발표분야 | 에너지/환경 |
| 제목 | Production of H2 by Photocatalytic Water-Splitting on Nanocomposite Semiconductors : CdS:Ni(II)KNbO3 |
| 초록 | Efficient hydrogen evolution was photocatalytically achieved by combining CdS with potassium niobate semiconductors, KNbO3 and Ni(II)-doped KNbO3, under visible light (l＞400nm) irradiation in a mixed isopropanol/water system. The quantum yields, f, for H2 production with visible light were found to be 4.7% and 0.58% for CdS:NiKNbO3 and CdS: KNbO3, respectively. 203mmole/hr∙g of H2 production rate under (UV+visible) irradiation(UVis) for CdS:NiKNbO3 was almost two times higher than that under visible light only, while CdS:KNbO3 under Uvis produced H2 1.2 times higher than 20.1mmole/hr∙g under visible only. The large enhancement in activity due to Ni(II) doping is attributed to substitution of Ni2+ for K+1 site of K+1Nb+5O3, which induces a slight modification of the basic crystal structure, resulting in enhancement of charge separation and thus higher probabilities of electron transfer to bound protons. Acknowledgement ; We are grateful to the Hydrogen Energy R&D Center of the 21st Century Frontier Research and Development Program of the Ministry of Science and Technology of Korea for financial support. |
| 저자 | 이태규, 윤우석, 김영미, 김동형 |
| 소속 | (주)나노팩 |
| 키워드 | hydrogen; water splitting; CdS |
| 원문파일 | 초록 보기 |
