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无机材料学报

无机材料学报

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棒状γ-Fe_2O_3纳米粒子的制备及表征

姜国华, 姜继森   

  1. 华东师范大学物理系, 纳米功能材料与器件应用研究中心, 上海 200062
  • 收稿日期:2004-08-11 修回日期:2004-09-29 出版日期:2005-09-20 网络出版日期:2005-09-20

Preparation and Characterization of Rod-like γ-Fe2O3 Nanoparticles

JIANG Guo-Hua, JIANG Ji-Sen   

  1. Department of Physics, Center for Functional Nanomaterials and Devices, East China Normal University, Shanghai 200062,China
  • Received:2004-08-11 Revised:2004-09-29 Published:2005-09-20 Online:2005-09-20

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摘要： 在聚乙二醇(PEG-400)存在的条件下, 在溶液中FeCl3与NaOH反应所得的沉淀物经抽滤后, 在空气中60℃干燥6h后再在不同温度下热处理. 所得的各样品用XRD、Mossbauer谱、TEM及FTIR等手段进行了表征. 结果表明, 沉淀经60℃干燥6h后?得到结晶较差的γ-Fe2O3
粉体(含少量结晶较好的α-FeOOH). 经300℃热处理1h后得长径比约为5的棒形γ-Fe2O3纳米粒子.

关键词: γ-Fe2O3, PEG-400, 纳米粒子

Abstract: This paper presented a new method to prepare γ-Fe2O3 nanoparticles. After the reaction of FeCl3 with NaOH in the presence of polyethylene glycol(PEG-400), the precipitate was dried at
60℃ in air and then calcined at different temperatures for 1h. XRD, Mossbauer spectroscope, TEM, FTIR and TG-DTA were used to characterize the obtained samples. The results
show that after the precipitate dried at 60℃ for 6h, a poor-crystalline γ-Fe2O3 powder forms, and calcined at 300℃ for 1h, the poor-crystalline powder turns to rod-like
γ-Fe2O3 nanoparticles with aspect ratio about 5.

Key words: γ-Fe2O3, PEG-400, nanoparticles

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