La-Doped Nanometer TiO2 Powders Prepared by Sol-Gel Method

La-doped Titania powders were synthesized by sol-gel method. The influence of dopant on the phase transformation temperature, Phase compositions, chemical states, microstructures and the visible light absorbable range of titania were investigated, which were characterized by X-ray diffractometer (XR...

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Bibliographic Details
Published in:Key engineering materials 2016-07, Vol.697, p.97-100
Main Authors: Du, Jing Hong, Yi, Jian Hong, Yan, Ji Kang, Jiang, Gui Min, Duan, Zhi Cao, Gan, Guo You, Rong, Xue Quan
Format: Article
Language:English
Subjects:
Morphology
Nitrates
Particle size
Phase transitions
Photocatalysis
R&D
Research & development
Temperature
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Summary:La-doped Titania powders were synthesized by sol-gel method. The influence of dopant on the phase transformation temperature, Phase compositions, chemical states, microstructures and the visible light absorbable range of titania were investigated, which were characterized by X-ray diffractometer (XRD), transmission electron microscopy (TEM), energy dispersion X-ray spectrum in scanning transmission electronic microscope (STEM-EDS) and UV-Vis spectrophotometer (UV-Vis). The results show that the dopant of La3+ significantly inhibited the phase transition and grain growth of TiO2.With the increasing of calcination temperature, the grain orientation of TiO2 are from clutter into order and the light absorption band edge of TiO2 are blue shift. La3+-doped titania precipitate La4Ti19O24 and the second phase precipitated on the surface of TiO2 with irregular spherical.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.697.97