Structural characterization and photocatalytic activity of electrospun TiO2 and Ce-doped TiO2 nanofibers

S. Sang-urai, A. Worayingyong, S. Maensiri, M. F. Smith, S. Seraphin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Mixed phase TiO2 and Ce-doped TiO2 nanofibers with different content (0.5, 2.0, 8.0%) of cerium ions were prepared by a sol-gel electro-spinning method. Results from SEM showed no beads on the undoped-TiO2 and Ce-doped TiO2 nanofibers with diameters in the range of 77-130 nm. TEM images exhibited that the undoped TiO2 crystallite size on the fiber was bigger than those on the Ce-doped samples. XRD and Ti K-edge XANES were used to determine anatase/rutile phase ratios in pure TiO2 nanofibers, whereas only XANES was used to characterize the anatase/rutile phase ratios in the Ce-doped TiO2 samples. Ce L 3-edge XANES exhibited peak associated with Ce+3 (5727 eV.) in addition to Ce+4 (5731 and 5738 eV.). Samples with the lowest Ce content had the greatest fraction of Ce ions in the Ce+3 state. The photocatalytic activity of the prepared nanofibers was observed by degradation of Rhodamine B under visible light, and the fiber of 0.5 % Ce-doped TiO2 exhibited the highest activity.

Original languageEnglish (US)
Title of host publicationTechnical Proceedings of the 2013 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2013
Pages475-478
Number of pages4
StatePublished - Aug 9 2013
EventNanotechnology 2013: Advanced Materials, CNTs, Particles, Films and Composites - 2013 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2013 - Washington, DC, United States
Duration: May 12 2013May 16 2013

Publication series

NameTechnical Proceedings of the 2013 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2013
Volume1

Other

OtherNanotechnology 2013: Advanced Materials, CNTs, Particles, Films and Composites - 2013 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2013
CountryUnited States
CityWashington, DC
Period5/12/135/16/13

Keywords

  • Cerium-doped
  • Electrospinning
  • Nanofibers
  • Titanium dioxide
  • XANES

ASJC Scopus subject areas

  • Biotechnology

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