摘要
在室温下，用三氯化铁（FeCl3·6H2O）、醋酸钠（CH3COONa）和乙酰丙酮通过简单的沉淀反应得到乙酰丙酮铁（Fe～（ACAC）3）固体粉末，并以此作为前驱体，在20％水合肼中80～160℃水热处理12h制得了纯Fe3O4（磁铁矿）纳米晶，利用XRD、TEM、VSM、FTIR和拉曼光谱等多种现代分析测试手段对产品的结构、组成、形貌、大小和磁性等进行了表征，并探讨了产物可能的合成机理．
Pure Fe3O4 nanocrystals with different sizes were synthesized via hydrothermal processing of an easily obtained, air - stable metallorganie molecular precursor （ferric acetylacetonate： Fe - （ACAC）3 ） in 20 vol. % hydrazine hydrate aqueous solution at 80 - 160 ℃ for 12 h. The phase, purity and size of the resultant products were characterized by powder X -ray diffraction （XRD） , Raman spectroscopy, Fourier transform infrared spectroscopy （FTIR） and transmission electronic microscope （TEM）, and the possible formation mechanism of F3O4 was tentatively proposed. The formation process of Fe3O4 nanocrystals indicated that the phase transformation probably evolved via a ＂dissolution -recrystallization＂ mechanism and accompanying the ＂Ostwald ripening＂ process. The hysteresis loops of the as -prepared Fe3O4 nanocrystals exhibited a ferromagnetic behavior with saturation magnetization （Ms） , remanence （Mr） and coercive force （Hc） values varying in the range of 11.2 - 14.5 emu/g, 0.9 -3.0 enm/g and 34.0 - 131.20e at room temperature.
出处
《郑州大学学报（工学版）》
CAS
2008年第4期17-21,27,共6页
Journal of Zhengzhou University（Engineering Science）
基金
北京市教育厅自然科学基金项目(KM200710005029)
关键词
FE3O4
单分子前躯体
磁性
Fe3O4 nanoerystal
hydrothermally
single-source
