Vapor-thermal preparation of highly crystallized TiO{sub 2} powder and its photocatalytic activity
- State Key Laboratory of Advanced Technology for Material Synthesis and Processing, Wuhan University of Technology, Luoshi Road 122, Wuhan 430070 (China)
Nanocrystalline anatase TiO{sub 2} powder photocatalysts were synthesized by a vapor-thermal method using tetrabutyl titanate as precursor at a temperature range from 120 to 200 deg. C. The as-synthesized products were characterized by X-ray diffraction, N{sub 2} adsorption-desorption measurement, transmission electron microscopy, high resolution transmission electron microscopy, Fourier transform infrared spectra, Raman spectra, and their photocatalytic activity was evaluated by photocatalytic oxidation decomposition of acetone in air. The results showed that reaction temperature greatly affected the microstructures and photocatalytic activity of the samples. With increasing reaction temperature and time, the average crystalline size of TiO{sub 2} particles increased and their crystallization enhanced, while the specific surface area of the products decreased. The TiO{sub 2} powders obtained at a temperature range from 150 to 200 deg. C for 10 h showed good photocatalytic activity and were greatly higher than that of Degussa P-25. - Graphical abstract: Nanocrystalline anatase TiO{sub 2} powder photocatalysts with a very high photocatalytic activity were synthesized by a vapor-thermal method using tetrabutyl titanate as precursor at a temperature range from 120 to 200 deg. C.
- OSTI ID:
- 21015876
- Journal Information:
- Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 7 Vol. 180; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ADSORPTION
CRYSTALLIZATION
CRYSTALS
DECOMPOSITION
FOURIER TRANSFORMATION
INFRARED SPECTRA
MICROSTRUCTURE
NANOSTRUCTURES
PARTICLES
PHOTOCATALYSIS
POWDERS
RAMAN SPECTRA
SPECIFIC SURFACE AREA
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
TITANATES
TITANIUM OXIDES
TRANSMISSION ELECTRON MICROSCOPY
VAPORS
X-RAY DIFFRACTION