Thermal behaviour of titanium dioxide nanoparticles prepared by precipitation from aqueous solutions

Thermogravimetry-differential thermal analysis, emanation thermal analysis, mass spectrometry detection, Fourier transform infrared and XRD were used to characterize thermal behaviour of titanium dioxide photocatalyst precursors prepared by precipitation at various conditions from peroxotitanic acid...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2010-08, Vol.101 (2), p.607-613
Main Authors: Pulišová, P., Boháček, J., Šubrt, J., Szatmáry, L., Bezdička, P., Večerníková, E., Balek, V.
Format: Article
Language:English
Subjects:
Analytical Chemistry
Anatase
Calorimetry
Catalysis
Catalysts: preparations and properties
Chemistry
Chemistry and Materials Science
Exact sciences and technology
General and physical chemistry
Heating
Inorganic Chemistry
Measurement Science and Instrumentation
Photocatalysis
Physical Chemistry
Polymer Sciences
Precipitation
Rain and rainfall
Sols
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Thermal analysis
Titanium dioxide
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Summary:Thermogravimetry-differential thermal analysis, emanation thermal analysis, mass spectrometry detection, Fourier transform infrared and XRD were used to characterize thermal behaviour of titanium dioxide photocatalyst precursors prepared by precipitation at various conditions from peroxotitanic acid sols. The transmission electron microscopy HRTEM technique was used to characterize the surface microstructure. The sols contained TiO 2 anatase particles of approximately 10 nm in diameter. During heating of the air dried samples, their chemical degradation took place giving rise to anatase. On further heating, the crystallization of anatase and formation of rutile phase was observed. To test the photocatalytic activity of the samples, the decomposition of 4-chlorophenol (4-CP) under ultraviolet and visible irradiation was monitored. It was shown that photocatalytic activities of the samples are comparable to the Degussa P25 photocatalyst reference material.
ISSN:1388-6150
1588-2926
1572-8943
DOI:10.1007/s10973-010-0893-7