| 학회 |
한국화학공학회 |
| 학술대회 |
2007년 가을 (10/26 ~ 10/27, 한국과학기술원) |
| 권호 |
13권 2호, p.2518 |
| 발표분야 |
촉매 및 반응공학 |
| 제목 |
Physical and optical properties of nanocrystalline calcium ferrite synthesized by the polymerized complex method |
| 초록 |
Nanocrystalline CaFe2O4 oxide semiconductor with spinel structure was synthesized by polymerized complex (PC) method and investigated for its physical and optical properties. The crystallization of CaFe2O4 made by PC method was found to occur in the temperature range of 700-1100℃. The observation of higly pure phase and such lower crystallization tempearture in CaFe2O4 made by PC method, is in total contrast to that observed in CaFe2O4 prepared by the conventional solid-state reaction (SSR) method. The activation energy required for the growth of nanocrystalline CaFe2O4 in PC sample was found to be 8.4 kJ/mol. The band gap of nanocrystalline CaFe2O4 determined by UV-DRS was 1.91 eV (647nm). The photocatalytic activity of PC materials for iso-propyl alcohol photodegradation under visible light (λ≥420nm) was much higher than that of SSR materials. |
| 저자 |
김현규1, 유성미1, 장점석2, 지상민2, 홍석준2, 정의덕1, 이재성2
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| 소속 |
1한국기초과학지원(연), 2포항공과대 |
| 키워드 |
Nanocrystal; calcium ferrite; polymerized complex method
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| E-Mail |
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| 원문파일 |
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