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Antibacterial titania-based photocatalytic extruded plastic films

Paper ID Volume ID Publish Year Pages File Format Full-Text
26407 43950 2015 7 PDF Available
Title
Antibacterial titania-based photocatalytic extruded plastic films
Abstract

•LDPE–TiO2 films produced by extrusion.•UVC pre-conditioning enhances the photocatalytic and antibacterial activity of the film.•Adsorption surface site density measured using a spectrophotometric technique.•Photocatalytic and antibacterial properties of the films are superior to Activ® self-cleaning glass.

Photocatalytic antibacterial low density polyethylene (LDPE)–TiO2 films are produced by an extrusion method and tested for photocatalytic oxidation activity, via the degradation of methylene blue (MB) and photocatalytic antibacterial activity, via the destruction of Escherichia coli. The MB test showed that extruded LDPE films with a TiO2 loading 30 wt.% were of optimum activity with no obvious decrease in film strength, although the activity was less than that exhibited by the commercial self-cleaning glass, Activ®. UVC pre-treatment (9.4 mW cm−2) of the latter film improved its activity, with the level of surface sites available for MB adsorption increasing linearly with UVC dose. Although the MB test revealed an optimum exposure time of ca. 60 min photocatalytic oxidation activity, only 30 min was used in the photocatalytic antibacterial tests in order to combine minimal reduction in film integrity with maximum film photocatalytic activity. The photocatalytic antibacterial activity of the latter film was over 10 times that of a non-UVC treated 30 wt.% TiO2 film, which, in turn was over 100 times more active than Activ®.

Graphical abstractPlastic TiO2 film is ca. 1000 times more effective against E. coli than commercial photocatalytic glass Activ®.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
TiO2; LDPE; Photocatalytic; Antibacterial; Methylene blue; E. coli
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Antibacterial titania-based photocatalytic extruded plastic films
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 299, 15 February 2015, Pages 159–165
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
Online Support
Any Questions? feel free to contact us