Formation mechanism of Fe2O3 hollow fibers by direct annealing of the electrospun composite fibers and their magnetic, electrochemical properties

Template-grown graphene/porous Fe2O3 nanocomposite: A high-performance anode material for pseudocapacitors

“…The crystal structure of G-Fe 2 O 3 was identified by XRD and the resultant pattern is shown in Figure 2a spectrum for the Fe 2p core level (inset of Figure 2b) shows two distinct peaks located at 711.0 and 724.6 eV, corresponding to a spin-orbit couple of Fe 2p 3/2 and Fe 2p 1/2 , respectively. In addition, these two peaks are accompanied by two shake-up satellites situated at 719.2 and 732.5 eV, representative of the Fe (III) valence state [45,46]. This result indicates that G-Fe 2 O 3 contains no or only trace amount of Fe 3 O 4 .…”

Electrospun Fe2O3 nanotubes and Fe3O4 nanofibers by citric acid sol‐gel method

“…The X-ray diffraction pattern of obtained samples is shown in Figure 4A The 27 The N 2 adsorption-desorption isotherm of Fe 2 O 3 samples is displayed in Figure 4B. The specific surface area and the pore diameter are 51.5 m 2 /g and 3.1 nm, respectively.…”

Direct fabrication of La0.7Sr0.3FeO3 nanofibers with tunable hollow structures by electrospinning and their gas sensing properties

“…Deionized water, DMF, and ethanol are used as solvents. During the process of electrospun, a gel layer would be formed on the surface of the composite nanofibers due to the rapid evaporation of solvents [10]. This gel layer has an important function to keep fibers texture during the heat treatment.…”

“…Coaxial electrospinning cannot overcome some problems, such as how to select a suitable inner solvent and how to accurately control electrospinning parameters. Single nozzle co-electrospinning must choose two different polymers, their blend ratios and solvent composition; otherwise, hollow fibers could not be produced [10]. To solve these shortcomings, a single capillary electrospinning has been applied in fabricating hollow nanofibers.…”