Sang-urai S., Worayingyong A., Mansiri S., Smith M.F., Seraphin S.
Kasetsart University, TH
Keywords: cerium-doped, electrospinning, nanofibers, titanium dioxide
Mixed phase TiO2 and Ce-doped TiO2 nanofibers with different content (0.5, 2.0, 8.0%) ofcerium ions were prepared by a sol-gel electro-spinning method. Results from SEM showed nobeads on the undoped-TiO2 and Ce-doped TiO2 nanofibers with diameters in the range of 77-130nm. TEM images exhibited that the undoped TiO2 crystallite size on the fiber was bigger thanthose on the Ce-doped samples. XRD and Ti K-edge XANES were used to determineanatase/rutile phase ratios in pure TiO2 nanofibers, whereas only XANES was used tocharacterize the anatase/rutile phase ratios in the Ce-doped TiO2 samples. Ce L3-edge XANESexhibited peak associated with Ce3+ (5727 eV.) in addition to Ce4+ (5731 and 5738 eV.).Samples with the lowest Ce content had the greatest fraction of Ce ions in the Ce3+ state. Thephotocatalytic activity of the prepared nanofibers was observed by degradation of Rhodamine Bunder visible light, and the fiber of 0.5 % Ce-doped TiO2 exhibited the highest activity.
Journal: TechConnect Briefs
Volume: 1, Nanotechnology 2013: Advanced Materials, CNTs, Particles, Films and Composites (Volume 1)
Published: May 12, 2013
Pages: 475 - 478
Industry sectors: Advanced Materials & Manufacturing | Energy & Sustainability
Topic: Catalysis
ISBN: 978-1-4822-0581-7