| 液相热分解纳米铁镍合金的形貌可控合成及其磁学性能研究 |
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| 引用本文： | 赖文忠,王 鹏,赵 威,冷永华,黄 婧,李星国. 液相热分解纳米铁镍合金的形貌可控合成及其磁学性能研究[J]. 无机化学学报, 2009, 25(10): 1703-1710 |
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| 作者姓名： | 赖文忠 王 鹏 赵 威 冷永华 黄 婧 李星国 |
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| 作者单位： | 1. 北京分子科学国家实验室,稀土材料化学及应用国家重点实验室,北京大学化学与分子工程学院,北京,100871;三明学院化学与生物工程系,三明,365004
2. 北京分子科学国家实验室,稀土材料化学及应用国家重点实验室,北京大学化学与分子工程学院,北京,100871 |
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| 基金项目： | 国家自然科学基金项目，863项目 |
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| 摘 要： | 以Fe(CO)5和Ni(HCOO)2为前驱物，十八烯为溶剂，在表面活性剂和分散剂油酸和油胺的协同作用下，通过前驱体的液相热分解和自合金化，制备铁镍合金纳米颗粒。通过XRD和TEM研究了产物的微观结构，并对产物的磁学性质进行了表征。结果表明，在反应温度为200 ℃，油胺与油酸及甲酸镍的物质的量比为4∶2∶1，反应时间为20 min时可得形貌可控、抗氧化性强的面心立方晶体结构的平面三角形纳米铁镍合金，晶粒尺寸为15~55 nm。磁性测量表明，300 K时三角形形貌铁镍合金的饱和磁化强度为15.5 emu·g-1，矫顽力趋近于零，呈现超顺磁性；在低温(4.2 K)时，铁镍合金的饱和磁化强度为17.5 emu·g-1，矫顽力增大明显。
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| 关 键 词： | 液相法； 形貌可控合成； 金属纳米颗粒； 铁镍合金； 磁学性能 |
Thermolysis Synthesis of Shape-Controlled Fe-Ni Alloy Nanoparticles and Magnetic Property |
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| LAI Wen-Zhong,WANG Peng,ZHAO Wei,LENG Yong-Hu,HUANG Jing and LI Xing-Guo. Thermolysis Synthesis of Shape-Controlled Fe-Ni Alloy Nanoparticles and Magnetic Property[J]. Chinese Journal of Inorganic Chemistry, 2009, 25(10): 1703-1710 |
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| Authors: | LAI Wen-Zhong WANG Peng ZHAO Wei LENG Yong-Hu HUANG Jing LI Xing-Guo |
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| Affiliation: | Beijing National Laboratory for Molecular Sciences, State Key Lab of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871; Department of Chemistry and Biology Engineering , Sanming University, Sanming, Fujian 365004,Beijing National Laboratory for Molecular Sciences, State Key Lab of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871,Beijing National Laboratory for Molecular Sciences, State Key Lab of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871,Beijing National Laboratory for Molecular Sciences, State Key Lab of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871,Beijing National Laboratory for Molecular Sciences, State Key Lab of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871 and Beijing National Laboratory for Molecular Sciences, State Key Lab of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871 |
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| Abstract: | Fe-Ni alloy nanoparticles were synthesized by thermal decomposition of Ni(COOH)_2 and Fe(CO)_5 with 1-octadecene as the solvent and oleic acid (OA) and oleylamine(OLA) as surfactants. The produced Fe-Ni alloy nanoparticles were characterized by X-ray diffraction(XRD), transmission electron microscope(TEM) and vibrating sample magnetometer(VSM). The results showed that a shape controlled fcc phase Fe-Ni alloy nanoparticles of triangular shape was formed when the molar ratio, of OA, OLA and Ni(HCOO)_2 was 4:2:1 at 200 ℃ fo 20 min. Magnetic measurements revealed the alloy nanoparticles of triangular shape exhibit superparamagnetic behavior with a saturation magnetization of 15.5 emu·g~(-1) at 300 K; a saturation magnetization of 17.5 emu·g~(-1) and a coer-civity of 158 Oe at 4.2 K. |
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| Keywords: | solution method shape control metal nanoparticles Fe-Ni alloy magnetic property |
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