SELECTED PROPERTIES OF LIGHT REFLECTED BY PHOTOCATALYTIC ACTIVE SURFACE

1 PECEN Josef
Co-authors:
2 ZABLOUDILOVÁ Petra
Institutions:
1 Czech University of Life Sciences Prague, Faculty of Tropical AgriSciences, Kamýcka 12, 965 21 Prague 6, Czech Republic, pecen@ftz.czu.cz
2 Research Institute of Agricultural Engineering, Drnovská 507, 161 01 Prague 6, Czech Republic, petra.zabloudilova@vuzt.cz
Conference:
8th International Conference on Nanomaterials - Research & Application, Hotel Voronez I, Brno, Czech Republic, EU, October 19th - 21st 2016
Proceedings:
Proceedings 8th International Conference on Nanomaterials - Research & Application
Pages:
269-274
ISBN:
978-80-87294-71-0
ISSN:
2694-930X
Published:
17th March 2017
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
33 views / 9 downloads
Abstract

The paper deals with a change in the luminous radiation reflected by surfaces with coats with photocatalytic active particles. In the executed laboratory experiments, we used two commercially available coats with photocatalysts on the basis of TiO2 and one coat without photocatalytic active particles. As the luminous radiation source, we used two different light sources with different spectre. The used light sources provided same radiation intensity at the place of measuring of the reflection from the surface of the sample. In individual phases of the experiments, we repeatedly measured the values of impacting and reflected radiation depending on the type of the coat, its moisture and the used luminous radiation source. The coats were applied to the area of 10x10 cm according to the recommendation of the manufacturer. The weight of the coat on thus prepared samples was ascertained by weighing the sample after it dries out. With regard to the elimination of various inhomogeneities in the coat layer on the sample surface, each sample was repeatedly measured both for impacting and reflected radiation (always after having been turned by 90°). The relation between the moisture of the coat and the reflected light radiation was non-linear and the value of reflected radiation decreased with increasing moisture of the coat layer. With increasing moisture of the coat, we also observed shift in the spectre of reflected radiation towards longer wavelengths.

Keywords: TiO2, coating, moisture, radiation reflection
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