Study on Preparation, Structures, and Properties of Carbon based Magnetic Ferrite Nanofibers

Abstract

Ferrite nanofibers with magnetic properties are a type of functional nanomaterials developed in recent years. Compared with common bulk materials, magnetic nanofibers are of great interest in research due to their characteristics including lightweight, large specific surface area, unique magnetism and magnetocrystalline anisotropy. In this study, Polyvinyl alcohol (PVA) was used as carrier, and magnetic α-Fe2O3/C nanofibers was prepared by electrospinning method, hydrothermal synthesis and high-temperature calcination. Then, the chemical structure, micromorphology, thermal properties, crystallization products and dye adsorption properties of the magnetic composite nanofibers were characterized by FT-IR, SEM, DSC, XRD and UV-Vis. The results show that: α-Fe2O3 is well coated on the surface of PVA-based fiber carrier, and magnetic α-Fe2O3/C nanofibers have three-dimensional (3D) tubular structures. Nanofibers have a single phase structure, and α-Fe2O3 nanoparticles on the the fiber surface are well crystallized and close-packed. Magnetic α-Fe2O3/C nanofibers can achieve the fast adsorption of methylene blue, and the dye removal rate can reach 78.3% at the time of 150 min.