Fabrication and Characterization of TiO2 /ZnO Nanofibers from PVAc Electrospun Microfiber for Renewable Energy Application

S.M. Camargo Silva, E. Muñoz-Prieto, E. Gomez-Pachon, R. Vera-Graziano
Universidad Pedagogica y Tecnológica de colombia and Instituto de Investigaciones en Materiales, UNAM,
Colombia

Keywords: TiO2 / ZnO nanofibers, poly(vinyl acetate) precursor, titanium isopropoxide, zinc oxide, electrospinning

Summary:

We report the study of titanium dioxide / zinc oxide nanofibers obtained from the calcination of precursor poly (vinyl acetate) fibers with titanium isopropoxide and zinc nanopowder, which were prepared by the electrospinning technique. The structure and morphology of nanofibers and precursor fibers were studied by Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD) and FESEM-EDS. The FTIR and XRD analyzes confirmed the formation of crystalline structures of titanium (anatase) and zinc oxides, after the calcination of the nanofibers at 500 °C. SEM micrographs show that both precursor fibers and nanofibers form random porous membranes, that TiO2 / ZnO nanofibers and precursor microfibers have average diameters in the range of 200 to 225 nm. TiO2 / ZnO nanofibers are electrically conductive. These characteristics suggest that titanium dioxide / zinc oxide nanofibers would have potential application in the field of renewable energy, in particular, for the manufacture of solar cells.