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International Journal of Photoenergy
Volume 2013 (2013), Article ID 795060, 6 pages
http://dx.doi.org/10.1155/2013/795060
Research Article

TiO2 and ZnO Nanoparticles in Photocatalytic and Hygienic Coatings

1University of Pardubice, Faculty of Chemical Technology, Institute of Chemistry and Technology of Macromolecular Materials, Studentská 573, 532 10 Pardubice, Czech Republic
2SYNPO, a.s., S. K. Neumanna 1316, 532 07 Pardubice, Czech Republic
3University of Pardubice, Faculty of Chemical Technology, Department of Biological and Biochemical Sciences, Studentská 573, 532 10 Pardubice, Czech Republic

Received 30 November 2012; Revised 21 January 2013; Accepted 28 January 2013

Academic Editor: Elias Stathatos

Copyright © 2013 Veronika Jašková et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Antimicrobial paints were based on the aqueous acrylic dispersion and various nanoparticles of zinc oxide and titanium dioxide. Antimicrobial ability and photoactivity were assumed in these paints. It was possible to observe the photoactivity thanks to change of organic dyes due to oxidative-reductive reaction. The best photocatalytic effect showed the coating containing the mixture of the first type of TiO2 and nano-ZnO despite the fact that the first type of TiO2 was not better in the photocatalytic test than the other types of TiO2. The agar dilution method was used to test antimicrobial ability. The Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus were chosen as test bacteria and Penicillium chrysogenum and Aspergillus niger as test molds. The antimicrobial effect of coatings with the mixture of the first type of TiO2 and nano-ZnO was the best of all the tested samples.