| 학회 |
한국화학공학회 |
| 학술대회 |
2011년 봄 (04/27 ~ 04/29, 창원컨벤션센터) |
| 권호 |
17권 1호, p.788 |
| 발표분야 |
재료 |
| 제목 |
Enhanced photocatalytic H2 evolution under visible light over SrTiO3:Cr/Ta prepared by spray pyrolysis from polymeric precursor |
| 초록 |
SrTiO3:Cr/Ta powders were prepared by spray pyrolysis from polymeric precursors. Effects of the amount of co-dopant and additives on the photocatalytic activity for hydrogen evolution from aqueous methanol solution under visible light irradiation (λ ＞ 415 nm) were investigated. For the photocatalyst prepared by spray pyrolysis from polymeric precursor, the hydrogen evolution rate was increased by a factor of ~100 and induction period was decreased by a factor of 8 compared with a photocatalyst prepared by solid state reaction. These enhancements result from increased roughness of surface, and the compositional uniformity which are intrinsic characteristics of spray pyrolysis. In addition, photocatalyst prepared by spray pyrolysis from polymeric precursor have large BET surface area and small amount of Cr6+ ion which is responsible for long induction period. It should be noted that the reduction of Cr6+ ion was achieved without hydrogen reduction process. |
| 저자 |
강현우, 임성남, 박승빈
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| 소속 |
한국과학기술원 |
| 키워드 |
hydrogen production; visible light; photocatalyst; spray pyrolysis
|
| E-Mail |
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| 원문파일 |
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