Monodispersed Co, Ni-ferrite nanoparticles with tunable sizes: Controlled synthesis, magnetic properties, and surface modification
Monodispersed Co, Ni-ferrite nanoparticles with tunable sizes: Controlled synthesis, magnetic properties, and surface modification
复制标题
尺寸可调的单分散钴、镍铁氧体纳米粒子：受控合成、磁性和表面改性
DOI：
10.1021/jp077019
复制
发表时间：
2008-01-31
影响因子：
3.7
通讯作者：
Jiang, Wei
中科院分区：
文献类型：
--
作者：
Jia, Xiao;Chen, Dairong;Jiang, Wei
通过在正辛醇中加热无机盐和十二烷基苯磺酸钠（SDBS）的混合物，制备了单分散在非极性溶剂中的Co、Ni和Fe组成不同的铁氧体（CoxNixFe 3-x-yO 4，x = 0.6，0.3，0.2，0，y = 0，0.6，0.7，0.8）纳米粒子。采用X射线衍射（XRD）、透射电子显微镜（TEM）、高分辨透射电子显微镜（HR-TEM）、选区电子衍射（SAED）、红外（IR）、热重（TG）等技术对所制备的纳米粒子进行了表征。可以通过调节反应时间来调节纳米颗粒的尺寸。根据实验结果，提出了溶剂热过程中纳米粒子的形成机理。研究了纳米粒子的粒径和组成对磁性能的影响，并比较了相同粒径不同组成的纳米粒子的磁性能。此外，通过简单地用乙酸洗涤所制备的纳米颗粒，获得水分散性纳米颗粒。
Ferrite (CoxNixFe3-x-yO4, x = 0.6, 0.3, 0.2, 0, y = 0, 0.6, 0.7, 0.8) nanoparticles monodispersed in nonpolar solvents have been prepared with different Co, Ni, and Fe compositions by heating mixtures of inorganic salts and sodium dodecylbenzenesulfonate (SDBS) in n-octanol. The as-prepared nanoparticles were characterized in detail by X-ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution TEM (HR-TEM), selective area electron diffraction (SAED), infrared (IR), thermal-gravimetric (TG) analysis, and other techniques. The narroparticle sizes could be tuned by adjusting the reaction time. The formation mechanism of the narroparticles during the solvothermal process is proposed based on the experimental results. The effects of size and composition of the nanoparticles on magnetic properties were investigated, and the magnetic properties of nanoparticles with the same size but different compositions were compared. Furthermore, water-dispersible nanoparticles were obtained by simply washing the as-prepared nanoparticles with acetic acid.