物理化学学报 >> 2003, Vol. 19 >> Issue (10): 944-947.doi: 10.3866/PKU.WHXB20031012

研究论文 上一篇    下一篇

Fe/SBA-3介孔组装体系及其磁特性

倪棋梁;张建成;刘健敏;沈悦   

  1. 上海大学（嘉定校区）材料学院,上海　201800
  • 收稿日期:2003-03-24 修回日期:2003-06-19 发布日期:2003-10-15
  • 通讯作者: 张建成 E-mail:Jchzhang@mail.shu.edu.cn

Fe/SAB-3 Composite Mesoporous Materials and Magnetic Properties

Ni Qi-Liang;Zhang Jian-Cheng;Liu Jian-Min;Shen Yue   

  1. School of Material Science and Engineering, Shanghai University(Jiading Campus), Shanghai　 201800
  • Received:2003-03-24 Revised:2003-06-19 Published:2003-10-15
  • Contact: Zhang Jian-Cheng E-mail:Jchzhang@mail.shu.edu.cn

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摘要： 用不同的实验工艺制备了一组Fe/SAB-3 介孔复合体系.X射线衍射表明,Fe/SAB-3具有六方排列的孔道结构.通过N2吸附实验可知,这种材料具有极高的比表面积.从傅立叶红外光谱可证实,Fe3＋进入了SAB-3的骨架.样品磁测量结果表明,与通常的α-Fe2O3纳米颗粒相比,纳米Fe/SAB-3介孔复合体系中的纳米α-Fe2O3 粒子的矫顽力（Hc）从1765 Oe下降到87 Oe,比饱和磁化强度（Ms）增加了75.4％.

关键词: 复合介孔材料, 组装, 比饱和磁化强度

Abstract: A new series of mesoporous silica materials containing nanodispersedα-Fe2O3were synthesized by different methods. X-ray diffraction patterns indicated thatα-Fe2O3/SAB-3 had a hexagonal array pore structure. The N2 adsorption and desorption showed that the materials had very high specific surface area.Fe3＋ entered into pore wall, which was confirmed by Fourier-transform infrared spectroscopy. The results of magnetic measurements showed that the coercive force(Hc) ofα-Fe2O3 decreased from 1 765 Oe to 87 Oe, specific saturation magnetization(Ms) increased by 75.4％ as compared with the conventional nanoα-Fe2O3 particles.

Key words: Composite mesoporous material, Assemble, Specific saturation magnetization