Abstract
Interests in the combined use of titanium dioxide (TiO2) photocatalyts with cementitious materials to produce functional cement based photocatalytic products (PCP) have attracted increasing research attention. However, an effective method to obtain a high photocatalytic efficiency, thus multiple photocatalytic functions, is in strong demand. This study investigated the strategy of directly applying a TiO2containing paint on the surface of self-compacting architectural mortars (SCAM). For comparison, 5% TiO2-intermixed SCAM samples were also prepared. The results showed that the TiO2coated SCAM sample displayed a high photocatalytic NOxand xylene removal ability under UV-A and Sunlight irradiation conditions. In contrast, 5% TiO2-intermixed samples only achieved a significantly lower NOxremoval efficiency, and failed to degrade xylene. In addition, the TiO2coating on the SCAM surface also demonstrated a high rhodamine B (RhB) degradation ability. Moreover, a total inactivation of Escherichia coli was observed after 120min UVA irradiation for the TiO2coated SCAM. Whereas, the 5% TiO2-intermixed SCAM only exhibited a negligible E. coli killing activity. All the architectural mortar samples were found to have a low bioreceptivity. Overall, the TiO2coated SCAM has the potential to be used as environmentally-friendly products for air-purifying, bactericidal and self-cleaning applications.
| Original language | English |
|---|---|
| Pages (from-to) | 1260-1268 |
| Number of pages | 9 |
| Journal | Materials and Design |
| Volume | 88 |
| DOIs | |
| Publication status | Published - 25 Dec 2015 |
Keywords
- Anti-algae fouling
- Anti-bacteria
- Photocatalytic NO removal x
- Rhodamine B degradation
- Xylene degradation
ASJC Scopus subject areas
- General Materials Science
- Mechanics of Materials
- Mechanical Engineering