| Study on supercritical hydrothermal synthesis of CoFe2O4 nanoparticles |
| D. Zhao; X. Wu; H. Guan; E. Han
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| 2007
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| 发表期刊 | Journal of Supercritical Fluids
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| ISSN | 0896-8446
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| 卷号 | 42期号:2页码:226-233 |
| 摘要 | 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. |
| 部门归属 | 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
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| 关键词 | 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
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| URL | 查看原文
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| WOS记录号 | WOS:000248168900009
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://ir.imr.ac.cn/handle/321006/34065
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| 专题 | 中国科学院金属研究所
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推荐引用方式
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.
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| 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.
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| 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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