| 학회 |
한국화학공학회 |
| 학술대회 |
2010년 봄 (04/22 ~ 04/23, 대구 EXCO) |
| 권호 |
16권 1호, p.264 |
| 발표분야 |
미립자공학 |
| 제목 |
A simple and continuous synthesis of magnetite nanoparticles using supercritical methanol |
| 초록 |
Magnetite (Fe3O4) nanoparticles were synthesized continuously in supercritical methanol (scMeOH) without using reducing agents at 30 MPa, 400 oC and residence time of 38 s. X-ray diffraction (XRD) analysis revealed that nanoparticles synthesized in scMeOH retained magnetite crystalline structure while those synthesized in supercritical water retained hematite (-Fe2O3) crystalline structure. The magnetite nanoparticles were spherical in shape with an average diameter of 21 ± 2 nm, as measured using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The scMeOH acted both as a reaction medium and a reducing agent. The reduction power of scMeOH was attributed to the dissociation of hydroxide ions from methanol molecules and involvement of the hydroxide ion in the reduction reaction. |
| 저자 |
밤방, 김재훈, 최혜민, 김재덕
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| 소속 |
KIST |
| 키워드 |
nanomaterials; metal nanoparticles; supercritical methanol
|
| E-Mail |
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| 원문파일 |
초록 보기 |
