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Photocatalytic microbial inactivation over Pd doped SnO2 and TiO2 thin films

Paper ID Volume ID Publish Year Pages File Format Full-Text
28472 44076 2006 9 PDF Available
Title
Photocatalytic microbial inactivation over Pd doped SnO2 and TiO2 thin films
Abstract

The photocatalytic antimicrobial activity over TiO2, SnO2 and their Pd doped thin film samples were determined against Escherichia coli, Staphylococcus aereus, Saccharomyces cerevisiae and Aspergilus niger spores. Higher antimicrobial activity was observed with TiO2 than SnO2 thin films and, Pd addition contributes to an increase in the activity of both semiconductor oxides. The highest microbial inactivation was achieved with 1% PdO/TiO2 against E. coli with a 98% decrease in survival after 2 h illumination. SnO2 was found to show lower photocatalytic efficiency against E. coli with a 56% decrease in survival after 2 h illumination and a 68% decrease in survival of E. coli after palladium addition. E. coli showed the least and S. cerevisiae showed the highest resistance against photocatalytic inactivation and, A. niger spores could not be inactivated up to 8 h illumination over all the surfaces. The antimicrobial efficiencies against different microorganisms and fungal spores were found to decrease in the following order: E. coli > S. aereus > S. cerevisiae > A. niger spores for which, complexity and strength of the cell walls increased in the same order.

Keywords
Photocatalytic inactivation; Antimicrobial surfaces; Palladium; TiO2; SnO2; Sol–gel; E. coli; S. aereus; S. cerevisiae; A. niger spores
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Photocatalytic microbial inactivation over Pd doped SnO2 and TiO2 thin films
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 184, Issue 3, 15 December 2006, Pages 313–321
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