Preparation and characterization of doped TiO_2 nanofibers by coaxial electrospining combined with sol-gel process

摘要

N, Fe, and W doped TiO_2 nanofibers were fabricated by coaxial electrospining and directly annealing poly-vinylpyrrolidone (PVP)/Tetrabutyl titanate (TBT) composite nanofibers. The crystal structure, morphology, and surface composition of the doped TiO_2 nanofibers were investigated by the X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS) respectively. The results show that the dopants have different influence on the surface topographies, the crystal structures and the transformation of anatase to rutile of TiO_2 nanofibers. Fe dopant promotes bigger influence on topographies, phase transformation and crystallite growth of TiO_2 nanofibers than that of either N or W dopant.