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化学学报
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化学学报 ›› 2004, Vol. 62 ›› Issue (5): 485-488. 上一篇    下一篇

研究论文

非晶态δ-FeOOH液相合成纳米级α-Fe2O3粉体的历程研究

孟哲1,2, 贾振斌2, 魏雨2   

  1. 1. 河北邢台学院化学系, 邢台, 054001;
    2. 河北师范大学化学学院, 石家庄, 050016
  • 投稿日期:2003-08-28 修回日期:2003-11-05 发布日期:2014-02-18
  • 通讯作者: 魏雨,E-mail:weiyu@mail.hebtu.edu.cn E-mail:weiyu@mail.hebtu.edu.cn
  • 基金资助:
    河北省自然科学基金(No.501115)资助项目.

Research on the Mechanism of the Formation of Nanoparticle of α-Fe2O3 Powder in Aqueous Solution with Amorphous δ-FeOOH

MENG Zhe1,2, JIA Zhen-Bin2, WEI Yu2   

  1. 1. Department of Chemistry, Xingtai College, Xingtai 054001;
    2. School of Chemistry, Hebei Normal University, Shijiazhuang 050016
  • Received:2003-08-28 Revised:2003-11-05 Published:2014-02-18

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以非晶态δ-FeOOH为前驱物的弱酸性悬浮液,液相快速合成粒径小于25 nm、准球形、高纯度α-Fe2O3粉体.结合XRD, FTIR, TEM, TG/DTA和粒度分析等测试手段,对δ-FeOOH液相相转化为α-Fe2O3过程中产物的物相、结构及形貌进行了表征.研究结果表明,非晶态δ-FeOOH属亚稳相,容易向稳定相α-Fe2O3及α-FeOOH转化,而α-FeOOH在沸腾回流中会自发地转化为α-Fe2O3.

关键词: 纳米粒子, 结构, 相转化, 前驱物

Ultrafine α-Fe2O3 powder, with spherical shape, high purity and a diameter of less than 25 nm, formed rapidly in weak acid suspension by using amorphous δ-FeOOH as precursor. The phase, structure and shape of the product were characterized by XRD, FTIR, TEM, TG/DTA and size-analysis. It is revealed that amorphous δ-FeOOH is sensitive to heat and transfers to stable α-Fe2O3 and α-FeOOH much easily, while α-FeOOH can spontaneously transfer to α-Fe2O3 under refluxing.

Key words: nanoparticle, structure, phase transformation, precursor