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材料工程  2014 

雾化热分解-氧化五羰基铁制备磁性氧化铁纳米粒子

DOI: 10.11868/j.issn.1001-4381.2014.08.010, PP. 51-54

Keywords: &gamma,-Fe2O3,雾化热分解,两段加热,单段加热,磁性能

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Abstract:

通过雾化热分解-氧化五羰基铁(Fe(CO)5),在雾化液中添加三乙二醇(TREG)和三正辛基氧膦(TOPO),及在收集液中添加羧基化单甲醚聚乙二醇(MPEG-COOH)等有机修饰剂合成γ-Fe2O3纳米粒子。研究两段加热和单段加热对合成γ-Fe2O3纳米粒子的形貌、粒径、分散性的影响,同时分析温度对γ-Fe2O3纳米粒子结晶性、形貌及磁性能的影响。结果表明合成的γ-Fe2O3纳米粒子结晶度随温度的升高而增加;MPEG-COOH已经修饰在γ-Fe2O3纳米粒子表面;在单段加热模式下温度为360,390,420℃和450℃时合成的γ-Fe2O3纳米粒子在300K下都具有超顺磁性,饱和磁化强度分别为30,37,41,71A·m2·kg-1;单段加热模式较两段加热模式合成的γ-Fe2O3纳米粒子分散性更好。

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