Effect of rapid cooling time on optical absorption and band gap energy of TiO2 nanoparticles

In this paper, TiO 2 nanoparticles were synthesized via sol–gel method by using of TiCl 4 as a precursor in the ethanol solution. The structure and the morphology of TiO 2 nanoparticles were characterized by X-ray diffraction and scanning electron microscopy. We have studied the optical properties b...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2014-06, Vol.25 (6), p.2450-2455
Main Authors: Taleshi, Farshad, Pahlavan, Ali
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Materials Science
Optical and Electronic Materials
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Summary:In this paper, TiO 2 nanoparticles were synthesized via sol–gel method by using of TiCl 4 as a precursor in the ethanol solution. The structure and the morphology of TiO 2 nanoparticles were characterized by X-ray diffraction and scanning electron microscopy. We have studied the optical properties by using of UV–Vis spectroscopy. The results show that the calcination temperature is an important factor in size of nanoparticles, the morphology of powders and the band gap energy of TiO 2 nanoparticles. Also, rapid cooling time of samples is an important factor to decrease band gap energies, considerably. The calculated band gap of the TiO 2 nanoparticles is in range of 2.39–3.50 eV.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-014-1894-2