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- Title
COMPARATIVE STUDY OF SOL - GEL DERIVED PURE AND Nd - DOPED TiO<sub>2</sub> NANOPOWDERS.
- Authors
Bachvarova-Nedelcheva, Albena; Yordanov, Stancho; Iordanova, Reni; Stambolova, Irina
- Abstract
The present study reports on the synthesis of pure and Nd - doped TiO2 nanopowders using the sol - gel technique. A comparison of their thermal stability and phase formation upon heating is made as well. It is found, on the ground of XRD analysis, that the prepared powdered samples are amorphous up to 300°C while the doping with 2% Nd preserves the mixed organic-inorganic amorphous structure at higher temperatures (400°C). It is also found that TiO2 (anatase) is the dominating crystalline phase in the temperature range of 400°C - 600°C. At 700°C, TiO2 (rutile) appears in the pure samples, while it is not detected at this temperature in the presence of Nd. The average crystallite size of TiO2 (anatase) is about 10 nm at 400°C. The doping with Nd results in obtaining particles of a lower size - 5 nm at 500°C. It is found by DTA that the decomposition of the organics is accompanied by a significant weight loss proceeding in the temperature range of 200°C - 300°C.
- Publication
Journal of Chemical Technology & Metallurgy, 2018, Vol 53, Issue 6, p1167
- ISSN
1314-7471
- Publication type
Academic Journal