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利用溶胶凝胶-水热法以及浸渍法制备了Fe及Co掺杂的SBA-15介孔纳米磁性材料,并采用X射线衍射(XRD)及振动样品磁强计(VSM)对制备的各种纳米磁性材料进行结构以及性能的测试、表征。实验结果显示掺杂的Fe以Fe2O3纳米颗粒存在于介孔分子筛的孔壁内,而掺杂的Co则以Co3O4纳米颗粒的形式存在于SBA-15介孔材料的孔道中,进而得到了具有复合结构的Co3O4/Fe2O3-SBA-15纳米磁性材料。进一步研究发现掺杂后的SBA-15介孔材料呈现铁磁性,而且随着Co3O4及Fe2O3纳米磁性材料含量的增加,依靠纳米磁性材料之间的交换耦合作用,SBA-15介孔材料的磁性能逐渐增强。
SBA-15 mesoporous nanomaterials doped with Fe and Co were prepared by sol-gel-hydrothermal method and impregnation method. The prepared samples were characterized by X-ray diffraction (XRD) and vibrating sample magnetometer (VSM) Nano-magnetic materials for structural and performance testing, characterization. The experimental results show that the doped Fe exists in the pore wall of the mesoporous molecular sieve as Fe2O3 nanoparticles while the doped Co exists in the pores of the SBA-15 mesoporous material in the form of Co3O4 nano-particles, Structure of Co3O4 / Fe2O3-SBA-15 nano-magnetic material. Further study shows that the doped SBA-15 mesoporous material exhibits ferromagnetism, and with the increase of the content of Co3O4 and Fe2O3 nano-magnetic materials, the magnetic properties of SBA-15 mesoporous materials rely on the exchange coupling between nano-magnetic materials Gradually enhanced.