Nitrogen and copper doped solar light active TiO2 photocatalysts for water decontamination

Authors:  Mike B. Fisher, Donal A. Keane, Pilar Fernández-Ibáñez, John Colreavy, Steven J. Hinder, Kevin G. McGuigan, Suresh C. Pillai

Abstract:
A novel class of photocatalytic coating capable of degrading bacterial and chemical contaminants in the presence of visible sunlight wavelengths was produced by depositing a stable photocatalytic TiO₂ film on the internal lumen of glass bottles via a sol–gel method. This coating was prepared in either undoped form or doped with nitrogen and/or copper to produce visible light-active TiO₂ films which were annealed at 600^◦C and were characterized by Raman and X-ray photoelectron spectroscopy. The presence of doped and undoped TiO₂ films was found to accelerate the degradation of methylene blue in the presence of natural sunlight, while copper-doped TiO₂ films were found to accelerate bacterial inactivation (of Escherichia coli and Enterococcus faecalis) in the presence of natural sunlight. 

Keywords:
Sunlight
Visible light
Titanium dioxide
Photocatalysis
Thin film
Emerging pollutants
SODIS
Disinfection
Bacterial deactivation
Contamination
Visible light
Depollution
Anatase

Published in: Applied Catalysis B: Environmental (Volumes 130–131, Pages 1-336, 7 February 2013)

Publisher: Elsevier  

ISSN Information: 0926-3373

Nitrogen and copper doped solar light active TiO2 photocatalysts for water decontamination

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