Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/43411
Title: Photocatalytic activities of titanium dioxide incorporated architectural mortars : effects of weathering and activation light
Authors: Guo, MZ
Maury-Ramirez, A
Poon, CS 
Keywords: Air-purifying
Photocatalytic NOx removal
Rhodamine b degradation
Self-cleaning
Self-compacting architectural mortar
Issue Date: 2015
Publisher: Pergamon Press
Source: Building and environment, 2015, v. 94, p. 395-402 How to cite?
Journal: Building and environment 
Abstract: Self-cleaning and air-purifying properties obtained through photocatalytic reactions on building materials containing TiO2 are functions aimed to reduce cleaning activities on buildings and alleviate air pollution. However, due to the significant effect of weathering on the removal efficiencies at outdoors and low UV-A intensity at indoors, the application of these materials has been limited. In this study, two methods of introduction of TiO2 particles on building materials were carried out and their photocatalytic performances, in particular the resistance to weathering, were compared. The results showed that a novel transparent photocatalytic coating applied on the architectural mortar performed better than the TiO2 intermixed samples in terms of air purifying (indicated by NOx removal) and self-cleaning (indicated by Rhodamine b removal) properties under both UV-A and visible light (VL) irradiation conditions. Moreover, no obvious deterioration was observed on the self-cleaning and air purification ability after the application of both a simulated facade weathering process, which represents a usage period of about 20 years under Hong Kong weather conditions, and an accelerated carbonation process. Findings from this study demonstrate that the TiO2-containing paint coated self-compacting mortar shows great promise as an attractive strategy to simultaneously combat air pollution problems and reduce maintenance costs in a sustainable way.
URI: http://hdl.handle.net/10397/43411
ISSN: 0360-1323
DOI: 10.1016/j.buildenv.2015.08.027
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

2
Last Week
0
Last month
Citations as of Mar 19, 2017

WEB OF SCIENCETM
Citations

1
Last Week
0
Last month
Citations as of Mar 30, 2017

Page view(s)

13
Last Week
1
Last month
Checked on Mar 26, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.