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Bactericidal activity of nitrogen-doped metal oxide nanocatalysts and the influence of bacterial extracellular polymeric substances (EPS)

Paper ID Volume ID Publish Year Pages File Format Full-Text
28149 44061 2007 7 PDF Available
Title
Bactericidal activity of nitrogen-doped metal oxide nanocatalysts and the influence of bacterial extracellular polymeric substances (EPS)
Abstract

The antibacterial effect of nitrogen-doped TiO2 and ZrO2 were tested on Escherichia coli and biofilm heterotrophic bacteria under solar light illumination. The rates of photocatalytic inactivation for biofilm bacteria with soluble extracellular polymeric substances (EPS) stripped off and E. coli bacteria were found to be higher than those of the biofilm bacteria with intact EPS. Measurements of both bacterial count and cellular components (carbohydrate and protein) revealed that EPS play an important role in controlling the kinetics of solar-induced photocatalysis. TiO2−xNx and ZrO2−xNx doped with ethylenediamine as the nitrogen source showed improved photoactivity compared with TiO2−xNx using ethanolamine as the nitrogen source.

Keywords
Bacteria inactivation; Extracellular polymeric substances (EPS); Solar light; Titanium dioxide; Nitrogen-doped nanoparticles
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Bactericidal activity of nitrogen-doped metal oxide nanocatalysts and the influence of bacterial extracellular polymeric substances (EPS)
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 190, Issue 1, 5 July 2007, Pages 94–100
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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
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Any Questions? feel free to contact us