铁酸钴纳米晶的低温合成、谱学表征及磁性

摘要/Abstract

摘要：

以十六烷基三甲基溴化铵（CTAB）为模板，Fe(NO3)3·9H2O和Co(NO3)2·6H2O为前躯体，NaOH为沉淀剂，低温回流合成了磁性铁酸钴纳米晶。利用X射线衍射、透射电子显微镜、红外光谱、拉曼光谱等测试技术对产品的结构进行了表征，借助振动样品磁强计测定了样品的室温磁性能。结果表明，铁酸钴纳米晶为单相立方尖晶石结构，纳米晶的平均粒径为15-20 nm。铁酸钴纳米晶在室温外加磁场下表现出明显的磁滞现象，饱和比磁化强度MS=36.5 A.m2/kg，矫顽力HC=5.89×104 A/m。

关键词: 铁酸钴，低温合成，红外光谱，拉曼光谱，磁性

Abstract:

CoFe2O4 nanocrystals were prepared by means of a low temperature refluxing method from CTAB as templet, Fe(NO3)3·9H2O and Co(NO3)2·6H2O as precursors, NaOH as precipitator. The as-prepared products were characterized by X-ray diffraction, transmission electron microscopy, infrared and Raman spectrometries. The room temperature magnetic properties were determined by means of vibrating sample magnetometer. The results show that CoFe2O4 has a single-phase spinel structure. The average particle size was in a range of 15-20 nm. CoFe2O4 exhibited a clearly magnetic hysteretic behavior under applied magnetic field at room temperature. The values of variation of saturation magnetization (Ms) and coercivity (HC) were 36.5 A•m2/kg and 5.89×104 A/m, respectively.

Key words: CoFe2O4,low-temperature synthesis,infrared spectrum,Raman spectrum,magnetic property

中图分类号:

O641.2

艾伦弘,蒋静. 铁酸钴纳米晶的低温合成、谱学表征及磁性[J]. 应用化学, 2010, 27(01): 78-81.

AI Lun-Hong*, JIANG Jing. Low-temperature Synthesis, Spectral Characterization and Magnetic Properties of CoFe2O4 Nanocrystals[J]. Chinese Journal of Applied Chemistry, 2010, 27(01): 78-81.

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铁酸钴纳米晶的低温合成、谱学表征及磁性

Low-temperature Synthesis, Spectral Characterization and Magnetic Properties of CoFe2O4 Nanocrystals

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