Abstract

Polyvinyl Pyrrolidone(PVP)/[La(NO3)3+Cr(NO3)3] composite nanofibers were fabricated by electrospinning. SEM
micrographs indicated that the surface of the prepared composite fibers was smooth, and the diameter of the
nanofibers was in the range of 1-3?m. XRD analysis revealed that the composite nanofibers were amorphous in
structure. LaCrO3 nanofibers were fabricated by calcination of the PVP/[La(NO3)3+Cr(NO3)3] composite fibers. The
diameters of LaCrO3 nanofibers were smaller than those of the relevant composite fibers. The surface of the LaCrO3
nanofibers became coarse with the increase of calcination temperatures. LaCrO3 hollow-centered and porous
nanofibers formed by nanoparticles were acquired when firing temperature was 600-900ºC. SEM images indicated
that the diameters of the synthesized LaCrO3 nanofibers ranged from 500 to 800nm, and their lengths were greater
than 100?m. XRD analysis revealed that LaCrO3 nanofibers were orthorhombic in structure with space group Pbnm.
Possible formation mechanism for LaCrO3 nanofibers was preliminarily proposed.

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