||Structural analysis of mesoporous ZrO_2 and TiO_2 nanofiber mats prepared by electrospinning methods
Lee, Chanmin ,
Shul, Yong-GunEinaga, Hisahiro
5 , 2016-02 , 九州大学大学院総合理工学府
Ag particles loaded mesoporous zirconia oxide (ZrO_2) and titanium oxide (TiO2) nanofibers were prepared by electrospinning methods followed by calcination at 500-600℃. The crystal structure of the Ag particles were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The fiber diameters for the ZrO_2 and TiO_2 mats were in the range of 60-160 nm and 50-450 nm, respectively. X-ray line broadening analysis showed that they were composed of smaller sized crystallites. Nitrogen-adsorption studies revealed that the ZrO_2 and TiO_2 fibers have both mesoporous and macroporous structures, which were originated from the aggregation of smaller crystallites than the fiber diameters and the interspaces formed by randomly oriented nanofibers. The deposition of Ag on the fibers followed by calcination at 500℃ changed the distribution of the mesopore sizes.