Acta Phys. -Chim. Sin. ›› 2003, Vol. 19 ›› Issue (10): 944-947.doi: 10.3866/PKU.WHXB20031012

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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

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