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

Paper ID Volume ID Publish Year Pages File Format Full-Text
45810 46423 2013 6 PDF Available
Title
Nitrogen and copper doped solar light active TiO2 photocatalysts for water decontamination
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.

Graphical abstractSchematic diagram of bacterial decontamination using visible light active catalyst.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► A stable photocatalytic sun-light-active TiO2 (VLAT) coating has been developed. ► Enhanced photocatalytic activity of coated bottles was observed. ► Visible light activated accelerated the degradation of methylene blue under natural sunlight. ► Doped TiO2 films accelerated bacterial (e.g. E. coli) inactivation under natural sunlight.

Keywords
Sunlight; Visible light; Titanium dioxide; Photocatalysis; Thin film; Emerging pollutants; SODIS; Disinfection; Bacterial deactivation; Contamination; Visible light; Depollution; Anatase
First Page Preview
Nitrogen and copper doped solar light active TiO2 photocatalysts for water decontamination
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 130–131, 7 February 2013, Pages 8–13
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis