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Effect of inorganic ions, H2O2 and pH on the photocatalytic inactivation of Escherichia coli with silver impregnated combustion synthesized TiO2 catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
46922 46453 2011 7 PDF Available
Title
Effect of inorganic ions, H2O2 and pH on the photocatalytic inactivation of Escherichia coli with silver impregnated combustion synthesized TiO2 catalyst
Abstract

The photocatalytic antibacterial activity of Ag impregnated combustion synthesized TiO2 (0.25 g/L) was studied against Escherichia coli in presence of UV irradiation. The effect of various parameters, such as anions, cations, hydrogen peroxide and pH, on the photocatalytic inactivation was investigated. The addition of inorganic ions showed a negative effect on inactivation. Among anions, the presence of chloride ions was observed to have a maximum negative effect and reduced the inactivation considerably. Among cations, the bacterial inactivation reduced significantly in the presence of Ca2+ ions. Hydrogen peroxide addition in combination with Ag/TiO2 photocatalysis, however, improved the inactivation. Photocatalysis with high concentration of H2O2 yielded complete bacterial inactivation within few minutes. The photocatalytic inactivation of E. coli was not affected by variation in pH.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Effect of ions, H2O2 and pH on photocatalytic inactivation of Escherichia coli with Ag/TiO2. ► Addition of ions shows negative effect on the inactivation. ► H2O2 addition improves the inactivation of E. coli. ► The inactivation remains unaffected by variation in pH.

Keywords
Photocatalysis; Escherichia coli; Combustion synthesis; Ag/TiO2; Anions; Cations; H2O2; pH
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Effect of inorganic ions, H2O2 and pH on the photocatalytic inactivation of Escherichia coli with silver impregnated combustion synthesized TiO2 catalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 106, Issues 3–4, 11 August 2011, Pages 453–459
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us