高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (1): 132.

• 研究快报 • 上一篇    下一篇

氧化铁气凝胶的制备及其表征

甘礼华, 李光明, 岳天仪, 陈龙, 武沈军, 周斌, 王珏   

  1. 同济大学, 上海 200092
  • 收稿日期:1998-08-12 出版日期:1999-01-24 发布日期:1999-01-24
  • 通讯作者: 甘礼华,男,34岁,硕士,讲师.
  • 基金资助:

    国家自然科学基金

Preparation and Characterization of Monolithic Iron Oxide Aerogels

GAN LI Hua, LI Guang-Ming, YUE Tian-Yi, CHEN Long-Wu, SHEN Jun, ZHOU Bin, WANG Jue   

  1. Department of Chemistry, Department of Physics, tongji University, Shanghai, 200092
  • Received:1998-08-12 Online:1999-01-24 Published:1999-01-24

摘要: 气凝胶是由纳米量级超细微粒或高聚物分子构成的多孔性固态材料[1,2],其杨氏模量、声传播速率、折射率、热导率和电导率等均与其宏观密度成标度关系.它拥有反常输运特性、动力学性质和低温热学性质.

关键词: 气凝胶, 氧化铁, 制备, 表征

Abstract: Material synthesis involved addition of aqueous sodium hydroxide to an iron chloride solutionfol owed by thermal dialysis, vacuum dehydration, and supercritical drying.XRD, Mo ssbauer, TEM, BET, DT Astudies of The aerogel samples indicat ed that initially obt ained aerogels were FeOOH, which would be completely converted into monolit hiciron oxide aerogels t hrough heating treat ment at 450.Monolithiciron oxide aerogels were with uniform size and low density, porous materials consisted of nearly spherical, nanometer ult ram icrous Fe2O3with diametersabout 60 nm.By adjusting molarratio of sodium hydroxide and ferric chloride(OH-/Fe3+), Thepore structure and specific surface area of The aerogel samples can be controlled.

Key words: Aerogels, Iron oxide, Preparation, Characterization

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