Study on Morphology and Size Distribution of Electrospun NiO-GDC Composite Nanofibers

Abstract

Nickel oxide-gadolinium doped ceria (NiO– Ce0.8Gd0.2O1.9) deserves special attention because of its high ionic conductivity. The nanocomposite fibers of this material are suitable as anode materials for low-temperature SOFCs. The composition and morphology of the nanofibers which prepared via electrospinning method were characterized by SEM, TEM and EDS. It was noticed that the fiber diameters gradually decreased from 190±77 nm to 75±27 nm by increasing the calcination temperature from 800 °C to 1000 °C. Further, the influence of the different parameters such as concentration of the polymeric pre-spinnable solution (CPS), concentration of the cationic solution (CCS), the applied voltage, tip-target distance, feed rate, diameter of the needle and the calcination temperature on the morphology of the fibers were investigated.

A different chemical route to prepare hafnium diboride‐based nanofibers: Effect of chemical composition

“…The slight breakage in the nanofibers structure can be attributed to the use of extremely high temperatures such as 1500°C for the heat‐treatment process. These results are consistent with the findings of other researchers 77,83 . The atomic percentages of hafnium and boron in the HfB 2 nanofibers are, respectively, 33.06% and 57.39%, which is close to the stoichiometric HfB 2 .…”

“…These results are consistent with the findings of other researchers. 77,83 The atomic percentages of hafnium and boron in the HfB 2 nanofibers are, respectively, 33.06% and 57.39%, which is close to the stoichiometric HfB 2 . The amorphous carbon and oxygen contents are about 2.34 and 7.21 at.% for HfB 2 nanofibers fabricated at 1500°C.…”

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“…In this latter case, the fibres formed often have large diameters which is a result of solvent being trapped within. 54 System properties such as polymer molecular weight, concentration, solution viscosity, solvent type and solution electroconductivity also affect the fibre morphology. Electrospinning relies on chain entanglement to produce fibres.…”

A review of recent progress in polymeric electrospun nanofiber membranes in addressing safe water global issues

“…Hence, in order to obtain smooth individual nanobers with desired properties, it is necessary to optimize the distance between needle tip and collector. 42,43 Ambient (environmental) parameters…”