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Citation: Ni Qi-Liang, Zhang Jian-Cheng, Liu Jian-Min, Shen Yue. Fe/SAB-3 Composite Mesoporous Materials and Magnetic Properties[J]. Acta Physico-Chimica Sinica, ;2003, 19(10): 944-947. doi: 10.3866/PKU.WHXB20031012 shu

Fe/SAB-3 Composite Mesoporous Materials and Magnetic Properties

1.
School of Material Science and Engineering, Shanghai University(Jiading Campus), Shanghai　 201800

Received Date: 24 March 2003
Available Online: 15 October 2003

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 hexa nal 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.
- Composite mesoporous material;Assemble;Specific saturation magnetization
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