| Autor: |
YOUNG SOO KANG, DONG RI ZHANG |
| Předmět: |
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| Zdroj: |
International Journal of Nanoscience; Apr-Jun2006, Vol. 5 Issue 2/3, p351-357, 7p, 2 Black and White Photographs, 5 Graphs |
| Abstrakt: |
Nanoparticles of titanium dioxide (TiO2) doped with 5 at.% Sc3+ ions were synthesized using the sol–gel method and calcined at 500°C to obtain better anatase phase. The crystal structures of the doped TiO2 nanoparticles were characterized by X-ray powder diffraction (XRD), Raman, UV-vis, FT-IR spectroscopy, high resolution transmission electron microscopy (HRTEM) and selected-area electron diffraction (SAED). XRD patterns and Raman spectra of TiO2 + 5 at.% Sc-500°C show the anatase phase and the average particle size of the sample calculated from XRD patterns was determined as 5.9 nm. Well-resolved rings of SAED of TiO2 doped with Sc3+ ions are easily indexed to those from XRD pattern. HRTEM shows the well-defined lattice fringes and the lattice spacing measured from HRTEM is 0.33 nm, which is in well agreement with the distance between the (101) planes in anatase TiO2. Energy-dispersive X-ray (EDX) spectrum of the doped TiO2 confirms the presence of Sc element in the TiO2 matrix. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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