| Study on supercritical hydrothermal synthesis of CoFe2O4 nanoparticles | |
| D. Zhao; X. Wu; H. Guan; E. Han | |
| 2007 | |
| Source Publication | Journal of Supercritical Fluids
 |
| ISSN | 0896-8446 |
| Volume | 42Issue:2Pages:226-233 |
| Abstract | CoFe2O4 nanoparticles with diameter of about 5 nm were prepared at 390 degrees C by batch supercritical hydrothermal synthesis method. It was found that the characteristic of products depended on pH, temperature, mole ratio (r) of Co2+ to Fe3+ and coexisting cations in reactant solutions. The reaction time and the coexisting cations (Na+ and K+) had little effect on the size and morphology of CoFe2O4 particles. The products were a mixture of CoFe2O4 and Fe2O3 at r < 0.5 and Co1+xFe2-xO4 (0 <= X <= 1) at r >= 0.5. Pure CoFe2O4 nanoparticles with uniform size were synthesized at 390 degrees C, pH 12 and r = 0.5. The maximum coercivity and saturation magnetization of CoFe2O4 prepared by the present method were 340.6 Oe and 68.9 emu/g, respectively. The mechanism for batch supercritical hydrothermal synthesis of CoFe2O4 nanoparticles is believed to be a homogeneous phase reaction of Co(NO3)(2)center dot 6H(2)O and Fe(NO3)(3)center dot 9H(2)O aqueous solution. (c) 2007 Elsevier B.V. All rights reserved. |
| description.department | chinese acad sci, inst met res, environm corros ctr, shenyang 110016, peoples r china.;zhao, d (reprint author), chinese acad sci, inst met res, environm corros ctr, 62 wencui rd, shenyang 110016, peoples r china;dzhao@imr.ac.cn |
| Keyword | Supercritical Water Hydrothermal Synthesis Cobalt Ferrite Nanoparticles Sol-gel Method Cobalt Ferrite Particles Manganese Zinc Ferrites Magnetic-properties Air Oxidation Coprecipitation Method Ultrafine Particles Oxide Nanoparticles Aqueous Suspensions Bearing Ferrite |
| URL | 查看原文 |
| WOS ID | WOS:000248168900009 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/34065 |
| Collection | 中国科学院金属研究所 |
| Recommended Citation GB/T 7714 | D. Zhao,X. Wu,H. Guan,et al. Study on supercritical hydrothermal synthesis of CoFe2O4 nanoparticles[J]. Journal of Supercritical Fluids,2007,42(2):226-233. |
| APA | D. Zhao,X. Wu,H. Guan,&E. Han.(2007).Study on supercritical hydrothermal synthesis of CoFe2O4 nanoparticles.Journal of Supercritical Fluids,42(2),226-233. |
| MLA | D. Zhao,et al."Study on supercritical hydrothermal synthesis of CoFe2O4 nanoparticles".Journal of Supercritical Fluids 42.2(2007):226-233. |
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