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应用科学学报 ›› 1997, Vol. 15 ›› Issue (2): 242-248.

• 论文 • 上一篇    下一篇

水热合成针形α-Fe2O3与表征

魏雨, 郑学忠, 邵素霞, 鹿平   

  1. 河北师范大学
  • 收稿日期:1995-11-03 修回日期:1996-01-27 出版日期:1997-06-30 发布日期:1997-06-30
  • 作者简介:魏雨:副教授,河北师范大学化学系,石家庄 050016

HYDROTHERMAL SYNTHESIS OF ACICULAR α-Fe2O3 AND ITS CHARACTERIZATION

WEI YU, ZHENG XIEZHONG, SHAO SHUXIA, LU PING   

  1. Hebei Nermal University, Shijiazhuang 050016
  • Received:1995-11-03 Revised:1996-01-27 Online:1997-06-30 Published:1997-06-30

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摘要： 在晶体助长剂存在时,用水热法由Fe(OH)3凝胶于180℃合成了针形α-Fe2O3,并用TEM、XRD、IR和TG进行了表征.在100℃时,用进行陈化的方法比较了4种晶体成长剂对α-Fe2O3的形成及其形态的影响,结果表明HEDP和DMPG有利于α-Fe2O3长成针形和纺锤形,而酒石酸和柠檬酸可使α-Fe2O3长成柱形和短柱形.最佳反应温度的选择取决于所加晶体成长剂的种类和浓度.

关键词: Fe(OH)3, 针形粒子, α-Fe2O3, 水热反应

Abstract: Acicular α-Fe2O3 particles hydrothermally synthesized at 180℃ from Fe(OH) 3 gel in the presence of morphological modifiers are characterized by transmission electron microscopy, X-ray diffraction, infrared spectroscopy and thermal gravimetric analysis. The influence of 4 modifiers on the formation of acicular α-Fe2O3 is compared by aging reaction at 100℃. The presence of HEDP and DMPG results in acicular and spindle crystals elongated along the c axis, tartaric acid and citric acid gave rod-like and short-column crystals. The choice of optimum reaction temperature depends on the modifier and its concentration.

Key words: hydrothermal reaction, α-Fe2O3, Fe2(OH) 3, acicular particle