Photocatalytic degradation of NOx in a pilot street canyon configuration using TiO2-mortar panels

Maggos, Thomas; Plassais, A.; Bartzis, John G.; Vasilakos, Christos; Moussiopoulos, Ν.; Bonafous, Laurent

doi:10.1007/s10661-007-9722-2

Cited by 149 publications

(86 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Hence, the need still exists to develop more in situ applications in which the relation between the efficiency in laboratory and on site is established, e.g. [15,16,17]. An overview of two such recent projects in Belgium is given in this section.…”

Section: Recent Photocatalytic Applications In Belgiummentioning

confidence: 99%

Photocatalytic roads: from lab tests to real scale applications

Boonen

Beeldens

2012

Eur. Transp. Res. Rev.

View full text Add to dashboard Cite

Purpose This paper gives an overview of our research on photocatalytic concrete, which exhibits air purifying properties. Under the action of sunlight, a catalyst present at the surface of the material is activated, enabling degradation of pollutants from the surroundings and transformation to less harmful products. It is a promising technique to reduce a number of air contaminants, especially at sites with a high level of pollution: highly trafficked canyon streets, road tunnels, etc. In addition, the combination with cement offers some synergistic advantages, as the reaction products can be adsorbed at the surface and subsequently washed away by rain. However, the great potential of this emerging technology is hampered by the lack of uniform testing methods at European level to evaluate the photocatalytic activity. Methods Laboratory research is undertaken at BRRC to compare existing methods and draw up recommendations for future standards. Furthermore, translation of lab testing towards results in situ remains critical to demonstrate the effectiveness on larger scale. In this perspective, several trial applications have recently been initiated in Belgium to asses the "real life" behavior. Results The paper gives a short overview of the photocatalytic principle and the application in concrete, as well as some main results of the laboratory research recognizing the important parameters that come into play. In addition, the implementation efforts of some recent realizations in Belgium will be presented.

show abstract

Section: Recent Photocatalytic Applications In Belgiummentioning

confidence: 99%

Photocatalytic roads: from lab tests to real scale applications

Boonen

Beeldens

2012

Eur. Transp. Res. Rev.

View full text Add to dashboard Cite

show abstract

“…Laboratory tests were then performed to prove the photocatalytic efficiency of this pavement blocks over time and the results were very promising [18]. The efficacy of NOx photoabatement using TiO2-mortar panels (also coated with TX Active®) was tested in outdoor conditions in France [19]. In this case study, three artificial canyon streets were constructed and NOx concentration levels monitored.…”

Section: Introductionmentioning

confidence: 99%

“…In this case study, three artificial canyon streets were constructed and NOx concentration levels monitored. The canyon streets covered with TiO2-mortar panels showed NOx photoabatement values in the range of 37-82%, depending on the pollutant concentration, wind direction and sun-light orientation [19]. Other very interesting projects developed under outdoor conditions were performed to foster the use of photocatalytic paints as a possible solution to overcome imminent environmental problems.…”

Section: Introductionmentioning

confidence: 99%

Highly active photocatalytic paint for NOx abatement under real-outdoor conditions

Ângelo

Andrade

Mendes

2014

Applied Catalysis A: General

View full text Add to dashboard Cite

In this work the photocatalytic activity of paints incorporating commercial titanium dioxide for outdoor nitrogen oxide (NO) photoabatement is assessed. The paint acts as a 3D support of the photocatalyst and thus allows a larger amount of TiO2 nanoparticles to absorb light and to contact with pollutants, when compared with a 2D photocatalytic surface. NO conversion and selectivity towards nitrites and nitrates were determined according to the standard ISO 22197-1:2007 (E).Paint coatings were formulated and tested under laboratory and outdoor conditions. The best paint formulation incorporates CristalACTiV TM PC500 photocatalyst from Cristal and calcium carbonate extender, presenting a NO conversion of ca. 70% and a selectivity of ca. 40% under laboratory conditions. The same photocatalyst but characterized in the form of an optically thick film of compressed powder presented ca. 95% and 45% of conversion and selectivity, respectively. Under the real-outdoor conditions, the best performing paint showed a NO conversion of about 95%.

show abstract

“…Real scale studies in streets or canyons have proven significant reductions of NO x in Belgium, in Italy and in France [15,23,24].…”

Section: Introductionmentioning

confidence: 99%