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Antibacterial activity of thin-film photocatalysts based on metal-modified TiO2 and TiO2:In2O3 nanocomposite

Paper ID Volume ID Publish Year Pages File Format Full-Text
47897 46485 2008 6 PDF Available
Title
Antibacterial activity of thin-film photocatalysts based on metal-modified TiO2 and TiO2:In2O3 nanocomposite
Abstract

Photoinduced bactericidal activity of nanostructured TiO2 and TiO2:In2O3 films and the effect of deposition of silver and bimetallic Ag/Ni nanoparticles on the pathophysiological properties of titania films were investigated. The antimicrobic activity of the films was assessed against Psedomonas fluorescens В-22 (gram-negative bacterium) and Lactococcus lactis ssp. lactis 411 (gram-positive bacterium). The silver-modified TiO2 film demonstrates the highest photobiocide efficiency, enhancing the bactericidal activity of UV light ca. 71-fold, that results from radical improvement of microorganism adsorption and suppression of recombination of photoproduced charge carriers. Higher inactivation rate observed for P. fluorescens as compared to L. lactis can be explained in terms of comparative morphologies of the cell envelops of gram-negative and gram-positive microorganisms and the resistance of their outer membranes to the reactive oxygen species generated by photocatalytic reactions.

Keywords
Antibacterial activity; Photocatalysis; TiO2
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Antibacterial activity of thin-film photocatalysts based on metal-modified TiO2 and TiO2:In2O3 nanocomposite
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 84, Issues 1–2, 25 October 2008, Pages 94–99
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
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