Fe_3O_4/TiO_2纳米异质结构的制备及磁性

Preparation and Magnetic Performance of Fe_3O_4/TiO_2 Hybrid Nanostructure

以TiO2纳米线和Fe(NO3)3·9H2O为原料,在一缩二乙二醇体系中通过溶剂热反应制备了Fe3O4纳米粒子/TiO2纳米线异质结构.高分辨透射电子显微镜(HRTEM)观测结果表明,Fe3O4纳米粒子均匀地附着在TiO2纳米线上,并与TiO2纳米线之间形成了有效的复合.磁性研究结果表明,与文献报道的同粒径纯相Fe3O4纳米粒子相比,异质结构的阻隔温度点明显降低,异质结构的形成对Fe3O4磁性产生了影响.

Using TiO2 nanowires and Fe （ NO3 ）3 · 9H2O as raw materials, Fe3O4 nanoparticles/TiO2 nanowires hybrid nanostructure was fabricated in a system with diethylene glycol as the solvent. High-resolu-tion transmission electron microscopy（ HRTEM） observation demonstrates that the Fe3 O4 nanoparticles are ad-dressed on the TiO2 nanowires. Effective connection forms between the Fe3 O4 nanoparticles and TiO2 nanowires. Magnetic study shows that the hybrid nanostructure’ s blocking temperature is significantly lower than that of pure Fe3 O4 nanoparticles with the same diameters.