| Surface Modfication of Fe3O4 Nanoparticles |
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| 作者姓名： | LIU Yong-jian JIA Hong-yi ZHUANG Hong |
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| 作者单位： | [1]Department of Chemistry, Suzhou College of Science and Technology, Suzhou , Jiangsu 215011, China [2]School of Chemistry and Environment Engineering, China University of Mining ＆ Technology, Beijing 100083, China |
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| 摘 要： | Nanometer particles are important portion of magnetic fluid. Fe3O4 magnetic nanoparticles were studied in this paper and the surface modification of Fe3O4 nanoparticles was investigated by a series of experiments. Fe3O4 magnetic nanoparticles were synthesized with pH value, temperature, and the dosage of surfactant. The phase, structure, size and magnetism of nanoparticles were tested by X-ray diffration （XRD）, transmission electron microscopy （TEM） and magnetic balance. On the basis of the surface modification coating mechanism, the experimental phenomena and the effects on the variation of size, magnetism and stability of Fe3O4 nanoparticles were theoretically analyzed. X-Ray diffraction spectrum and TEM photograph show that 1） the nanoparticles structure is perfect, 2） the diameter of narnoparticles is small and have good deliquescence, and 3） Sodium oleate is the anion surfactant. Therefore 1） the good condition of surface modification is in an acidic solution, 2） the best temperature of surface modification is at 80 ℃, and 3） the dosage of surfactant should be about 0.6 times of that of Fe^2＋.
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| 关 键 词： | Fe3O4 XRD TEM 纳米粒子 磁性材料 表面改性 |
| 收稿时间： | 2006-03-12 |
| 修稿时间： | 2006-04-23 |
Surface Modfication of Fe3O4 Nanoparticles |
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| LIU Yong-jian JIA Hong-yi ZHUANG Hong.Surface Modfication of Fe3O4 Nanoparticles[J].Journal of China University of Mining and Technology,2006,16(3):359-361. |
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| Authors: | LIU Yong-jian JIA Hong-yi ZHUANG Hong |
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| Abstract: | Nanometer particles are important portion of magnetic fluid. Fe3O4 magnetic nanoparticles were studied in this paper and the surface modification of Fe3O4 nanoparticles was investigated by a series of experiments. Fe3O4 magnetic nanoparticles were synthesized with pH value, temperature, and the dosage of surfactant. The phase, structure, size and magnetism of nanoparticles were tested by X-ray diffration (XRD), transmission electron microscopy (TEM) and magnetic balance. On the basis of the surface modification coating mechanism, the experimental phenomena and the effects on the variation of size, magnetism and stability of Fe3O4 nanoparticles were theoretically analyzed. X-Ray diffraction spectrum and TEM photograph show that 1) the nanoparticles structure is perfect, 2) the diameter of namoparticles is small and have good deliquescence, and 3) Sodium oleate is the anion surfactant. Therefore 1) the good condition of surface modification is in an acidic solution, 2) the best temperature of surface modification is at 80 ℃, and 3) the dosage of surfactant should be about 0.6 times of that of Fe2+. |
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| Keywords: | Fe3O4 nanoparticles magnetic grain surface modification mechanism |
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