Facile fabrication of long α-Fe2O3, α-Fe and γ-Fe2O3 hollow fibers using sol–gel combined co-electrospinning technology

Long α-Fe2O3 hollow fibers have been prepared through a facile sol–gel combined co-electrospinning technique using ferric citrate as precursor, and α-Fe and γ-Fe2O3 hollow fibers have been obtained by reduction and reoxidation at different conditions. The outer diameter of the as-prepared hollow fibers is 0.5–5 μm with wall thickness of 200–800 nm. The obtained tubular fibers were characterized by thermal gravimetric (TG), FT-IR spectra, X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and Raman techniques. In addition, magnetic properties of α-Fe and γ-Fe2O3 hollow fibers have also been investigated.

Graphical abstractLong α-Fe2O3 hollow fibers have been prepared through sol–gel method combined with co-electrospinning technology, and α-Fe and γ-Fe2O3 hollow fibers have been obtained by deoxidize at different conditions.Figure optionsDownload full-size imageDownload as PowerPoint slide