多孔朵状Fe_3O_4纳米微球的制备及其性能研究

Preparation and Characterization Studies on Porous Flower-Like Fe_3O_4 Nanospheres

众所周知,纳米材料的尺寸大小、晶型、形貌构型等结构特征对材料的化学物理性能有重要的影响,由于特殊形貌的新材料所具有独特、新颖、高效的化学物理等方面的性质以及在众多领域中的潜在应用,特别是3D花状空心纳米结构新物质,新形貌物质的纳米材料的制备方法和应用特性已经吸引了世界上材料领域的广泛兴趣和关注。目前为止,合成3D纳米结构的方法有自组装法、三维导向连接法以及水热法等,

Porous flower-like Fe3O4 nanospheres were assembled by soft templating method using Ammonium Tartrate in ethanol solvent, and then Fe3O4 nanospheres with hollow size about 20nm were obtained by the N2 supercritical drying. SEM, TEM, XRD, BET and VSM techniques were adopted to characterize the spherical morphology, hollow structure, phase composition, specific surface area and magnetic properties of the final product, respectively. The possible formation mechanism of the porous flower-like Fe3O4 nanospheres was discussed. The results indicate that the as-obtained porous flower-like Fe3O4 nanospheres were pure, and the specific surface area was 168.61 m^2·g^-1, the saturation magnetization was 84.09 emu·g^-1.