A Simple Way to Prepare C–N-Codoped TiO2 Photocatalyst with Visible-Light Activity

A simple method for preparing nanocrystalline C–N-codoped TiO 2 photocatalyst was developed by annealing titanium carbonitride. The prepared C–N-codoped TiO 2 powders were characterized by TGA, XRD, XPS, UV–Vis, PL, SEM, and BET surface areas. The photocatalytic activity was evaluated by the photoca...

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Bibliographic Details
Published in:Catalysis letters 2009-05, Vol.129 (3-4), p.462-470
Main Authors: Yu, Changlin, Yu, Jimmy C.
Format: Article
Language:English
Subjects:
Annealing
Aqueous solutions
Catalysis
Catalytic activity
Chemistry
Chemistry and Materials Science
Crystal structure
Electromagnetic absorption
Electron recombination
Exact sciences and technology
General and physical chemistry
Industrial Chemistry/Chemical Engineering
Methylene blue
Organometallic Chemistry
Photocatalysis
Photocatalysts
Photochemistry
Photodegradation
Physical Chemistry
Physical chemistry of induced reactions (with radiations, particles and ultrasonics)
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Titanium carbonitride
Titanium dioxide
X ray photoelectron spectroscopy
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Summary:A simple method for preparing nanocrystalline C–N-codoped TiO 2 photocatalyst was developed by annealing titanium carbonitride. The prepared C–N-codoped TiO 2 powders were characterized by TGA, XRD, XPS, UV–Vis, PL, SEM, and BET surface areas. The photocatalytic activity was evaluated by the photocatalytic degradation of methylene blue in an aqueous solution under visible-light radiation. Results showed that the annealing temperatures and time affected the crystal composition and structure and activity of the catalyst. The most promoting effect of C–N-codoping in activity was obtained over C–N-codoped TiO 2 prepared by annealing titanium carbonitride at 400 °C for 8 h. The high photocatalytic activity could be attributed to the synergetic effects in light absorption and the suppression of recombination of electrons/holes pairs.
ISSN:1011-372X
1572-879X
DOI:10.1007/s10562-008-9824-7