经Fe(NO_3)_3处理的Fe_3O_4纳米微粒分析

Analysis of Fe_3O_4 Nanoparticles Treated with Fe(NO_3)_3

用振动样品磁强计、透射电子显微镜、X-射线衍射仪、X-射线光电子能谱仪对用共沉淀法制备,并通过Fe(NO3)3处理的Fe3O4纳米微粒进行了分析。结果表明,Fe3O4纳米微粒通过Fe(NO3)3处理后,其表面生成了抗氧化、抗酸溶解的非磁性N-O-Fe物质,其结合能N1 s为406.65 eV,O1 s为532.93 eV,Fe2p3/2为710.09 eV。

Fe3O4 nanoparticles, prepared by coprecipitation and treated with Fe（ NO3） 3, were analyzed by vibrating sample magnetometer, transmission electron microscope, X-ray diffraction instrument and X-ray photoelectron energy spectrometer. The results showed that a fine N - O - Fe layer was formed on the surface of the treated Fe3O4 nanoparticles. The surface layer is non-magnetics, resistant to oxidation and acid. The binding energies are E（Nls） = 406.65 eV, E（O18） = 532.93 eV and E（Fe2P3/2） = 710.09 eV, respectively.