Abstract
In this study, a spraying method was employed to coat nano-TiO2 particles on the surface of concrete surface layers. For comparison reasons, an intermixing method was also used to embed 5% nano-TiO2 particles in the testing samples. Photocatalytic degradation of NO was evaluated to compare their air-purifying efficiencies. A harsh abrasion was imposed on the testing samples to evaluate the resistance of the surface TiO2-particles to weathering. The results showed that after 7 days curing, all the TiO2 sprayed samples displayed higher photocatalytic NO removal activities than the TiO2 intermixed samples. After 28 days curing, a slight reduction in NO removal was observed. Although abrasion exerted a significant photocatalytic reduction on the TiO2 sprayed samples, they still retained a NO removal ability that was higher than that of the TiO2 intermixed samples.
Original language | English |
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Article number | e261 |
Journal | Sustainable Construction Materials and Technologies |
Volume | 2013-August |
Publication status | Published - 1 Jan 2013 |
Event | 3rd International Conference on Sustainable Construction Materials and Technologies, SCMT 2013 - Kyoto, Japan Duration: 18 Aug 2013 → 21 Aug 2013 |
Keywords
- Cementitious materials
- NO removal
- Spraying
- Titanium dioxide
- Weathering
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- Mechanics of Materials
- General Materials Science