Havigh Roya Shokrani, Chenari Hossein Mahmoudi
Department of Physics, Faculty of Science, University of Guilan, Namjoo Ave, PO Box 41335-1914, Rasht, Iran.
Phys Chem Chem Phys. 2023 Mar 22;25(12):8684-8691. doi: 10.1039/d2cp05769g.
A γ-FeO/carbon nanofiber composite was prepared by electrospinning a mixed solution of iron nitrate nonahydrate (Fe(NO)·9HO) and polyvinylpyrrolidone (PVP) with subsequent treatment under an Ar atmosphere. A morphology study of the γ-FeO/carbon nanofiber composite using FE-SEM, TEM, and AFM techniques confirms the formation of randomly oriented carbon fibers that include γ-FeO nanoparticles, along with an agglomeration in the fibrous environment and surface roughness of the fibers. Structural analysis from the XRD patterns showed that the synthesized sample was ferric oxide having a gamma phase tetragonal crystal structure and amorphous behavior of carbon. FT-IR spectroscopy further demonstrated the presence of functional groups corresponding to γ-FeO and carbon in the γ-FeO/C structure. DRS spectra of the γ-FeO/C fibers indicate absorption peaks related to γ-FeO and carbon in the γ-FeO/carbon composite. In view of the magnetic properties, the composite nanofibers showed a high saturation magnetization of 53.55 emu g.
通过静电纺丝硝酸铁九水合物（Fe(NO)·9HO）和聚乙烯吡咯烷酮（PVP）的混合溶液，并随后在氩气气氛下进行处理，制备了γ-FeO/碳纳米纤维复合材料。使用场发射扫描电子显微镜（FE-SEM）、透射电子显微镜（TEM）和原子力显微镜（AFM）技术对γ-FeO/碳纳米纤维复合材料进行的形态学研究证实，形成了包含γ-FeO纳米颗粒的随机取向碳纤维，同时在纤维环境中存在团聚现象，且纤维表面粗糙。X射线衍射（XRD）图谱的结构分析表明，合成的样品是具有γ相四方晶体结构的氧化铁以及无定形碳。傅里叶变换红外光谱（FT-IR）进一步证明了γ-FeO/C结构中存在与γ-FeO和碳对应的官能团。γ-FeO/C纤维的漫反射光谱（DRS）表明，γ-FeO/碳复合材料中存在与γ-FeO和碳相关的吸收峰。考虑到磁性，复合纳米纤维显示出53.55 emu g的高饱和磁化强度。
