Preparation and characterization of hollow Fe_2O_3 ultra-fine fibers by centrifugal spinning

摘要

In this paper, the hollow Fe_2O_3 ultra-fine fibers were successfully prepared by the centrifugal spinning followed by the calcination process. Several spinning parameters including the concentration of FeCl_3, rotational speed and diameter of spinneret were discussed for determination of optimum spinning condition. The resultant as-spun fibers and hollow Fe_2O_3 ultra-fine fibers were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), thermal gravimetric analysis (TGA), FT-IR spectra and X-ray photoelectron spectroscopy (XPS). The results showed that the diameters of the as-spun fibers and the hollow Fe_2O_3 ultra-fine fibers were 1.0-6.0 μm and 05-5.0 μm, respectively. The concentration of FeCl_3 had an impact on as-spun fibers hardly, but on diameters of the hollow Fe_2O_3 ultra-fine fibers. The diameters of the as-spun fibers become smaller and the hollow Fe_2O_3 ultra-fine fibers become more fragile when the rotational speed increased or the inner diameter of the spinneret decreased.