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- 2018
油酸调制的γ-Fe2O3磁性纳米颗粒的表征研究
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Abstract:
使用化学诱导相变法(CIT法)并选用FeCl2溶液作为处理液，在合成γ-Fe2O3基纳米颗粒的过程中，加入油酸作为表面活性剂，对γ-Fe2O3纳米颗粒进行了表面调制.使用透射电子显微镜(TEM)、振动样品磁强计(VSM)、高分辨电子显微镜(HRTEM)、X射线衍射仪(XRD)和X射线能谱仪(EDS)对所制备的纳米颗粒的形貌、磁化性质、晶体结构和化学成分进行了表征与分析.结果表明，该研究制备的纳米颗粒基本为球形单晶微粒；油酸有助于纳米颗粒外延生长，且当油酸加入量足够时，油酸可完全取代由CIT法所制备纳米颗粒表层的FeCl3·6H2O.
γ-Fe2O3 oleic acid-coated magnetic nanoparticles were prepared by adding oleic acid as a surfactant in the process of synthesizing γ-Fe2O3-based nanoparticles with the CIT (chemically-induced transition) method and FeCl2 solution as the treatment solution. The morphology, magnetization properties, crystal structure and the chemical compositions of the prepared nanoparticles were characterized and analyzed by transmission electron microscopy (TEM), vibrating sample magnetometry (VSM), high resolution electron microscopy (HRTEM), X-ray diffraction (XRD) and energy-dispersive X-ray spectroscopy (EDS). The experimental results showed that the nanoparticles prepared were essentially single sphere-shaped crystals, that oleic acid contributed to the epitaxial growth of the nanoparticles, and that when oleic acid was added in sufficient amount, it could completely replace FeCl3·6H2O
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