Title
Effect of process parameters on the photocatalytic soot degradation on self-cleaning cementitious materials Effect of process parameters on the photocatalytic soot degradation on self-cleaning cementitious materials
Author
Faculty/Department
Faculty of Sciences. Bioscience Engineering
Faculty of Applied Engineering Sciences
Publication type
article
Publication
Amsterdam ,
Subject
Chemistry
Source (journal)
Catalysis today. - Amsterdam
Volume/pages
230(2014) , p. 250-255
ISSN
0920-5861
ISI
000333800300039
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Soot deposition has the negative ability to devalue the aesthetic appearance of buildings. Titanium dioxide applied on the building material is one way to counteract this problem as it provides air-purifying and self-cleaning properties due to its photocatalytic activity. In literature, photocatalytic soot oxidation was described, but until now, little information was available about the influence of process parameters on the photocatalytic degradation efficiency. The influence of three process parameters was tested in this study, namely TiO2 concentration, soot concentration and water-to-cement ratio (WIC-ratio) of the mortar substrates. The results revealed 50 mu gTiO(2) cm(-2) is better to use on the cementitious materials than 250 mu gTiO(2) cm(-2). The soot concentrations occurring in real-world situations will not inhibit the photocatalyst to be activated by light. Furthermore, the photonic efficiency increases slightly for lower WIC-ratios. This can be of interest for structural building applications, since a lower WIC-ratio results in a lower porosity of the samples and consequently in an increase in mortar strength. (C) 2013 Elsevier B.V. All rights reserved.
E-info
https://repository.uantwerpen.be/docman/iruaauth/af0978/cef7556.pdf
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