Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/24143
Title: Photocatalytic cement-based materials : comparison of nitrogen oxides and toluene removal potentials and evaluation of self-cleaning performance
Authors: Chen, J
Kou, SC
Poon, CS 
Keywords: Air pollution mitigation
Photocatalytic cement-based materials
Photocatalytic oxidation
Self-cleaning
Issue Date: 2011
Publisher: Pergamon Press
Source: Building and environment, 2011, v. 46, no. 9, p. 1827-1833 How to cite?
Journal: Building and environment 
Abstract: Using cement-based building materials as a matrix for nano-photocatalysts is an important development for the large scale application of photocatalytic technologies. Air pollution mitigation and self-cleaning surface are two major applications of photocatalytic building materials. In this study, a comparison was made to evaluate the performance of TiO 2 modified concrete surface layers for NO x and VOC degradation. The self-cleaning performance of TiO 2 modified self-compacting mortars (SCM) developed for decorative applications was also evaluated. The results show that the photocatalytic conversion of toluene by the TiO 2 modified surface layer was not detected, although NO x could be effectively removed under the same conditions. The presence of toluene did not influence the NO x removal process. TiO 2 modified SCM were found to be effective in the discoloration of rhodamine B under UV and strong halogen light irradiation. The level of adsorption of the air contaminants onto the active sites of the cement-TiO 2 composite was identified to be the key factor determining the subsequent photocatalytic efficiency.
URI: http://hdl.handle.net/10397/24143
ISSN: 0360-1323
EISSN: 1873-684X
DOI: 10.1016/j.buildenv.2011.03.004
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