Pervious concrete with titanium dioxide as a photocatalyst compound for a greener urban road environment

Shen, Shihui; Burton, Maria; Jobson, B. T.; Haselbach, Liv

doi:10.1016/j.conbuildmat.2012.04.097

Cited by 122 publications

(61 citation statements)

References 8 publications

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“…Strong sunlight or ultraviolet (UV) radiaition and solar light naturally causes organic material to decompose and with the use of photocatalysts, the process is accelerated (Concrete Society 2015). Research has shown that reactions which take place closer to the source cause greater depollution (Chen, Poon 2009;Shen et al 2012).It has also been found that the speed of the reactions depend on the intensity of light, environmental conditions, adhesion of pollutants and amount of TiO2 (Beeldens 2006). If pavements and buildings are replaced with photocatalytic concrete then the photochemical reactions could be taking place contionusly, where pollutants are produced by cars and buildings.…”

Section: Photocatalytic Concrete Pavementsmentioning

confidence: 99%

Developing Novel Photocatalytic Cementitious Permeable Pavements for Depollution of Contaminants and Impurities in Urban Cities

Tota-Maharaj

Coleman

2017

Proccedings of 10th International Conference "Environmental Engineering"

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Abstract. Photocatalyst such as Titanium Dioxide (TiO2) has been recently introduced as a nanoparticle into cementitious permeable pavements. Combining photocatalytic compounds within concrete permeable pavements can aid with depollution of several contaminants found in urban water streams and air impurities. This paper presents research carried out at the University of Greenwich, UK using photocatalytic concrete with varying percentages of TiO2 (0 %, 1% and 5%) to assess the levels depollution which can be achieved. Concrete samples were testing against the degradation of 2, 4-Dichlorophenoxyacetic Acid, a harmful chemical found in herbicides. This advanced oxidation process can aid in the reduction of urban pollution from an air and water perspective, improving sustainability for urban cities. Self-cleaning benefits of photocatalytic concrete permeable pavements can be used to keep urban infrastructure cleaner and more aesthetically pleasing. Experimental tests were carried out on the characterisation of inorganics through X-Ray diffraction and Fourier Transform Infrared Spectroscopy to ensure that the structures of the concrete samples were not altered by addition of the nanoparticles (photocatalyst). Experimental results were compared to that found in previous literature and confirmed that the addition of 5% TiO2 did not affect the structure of the concrete samples and can be a viable option used in urban infrastructure such as permeable pavements.

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Section: Photocatalytic Concrete Pavementsmentioning

confidence: 99%

Developing Novel Photocatalytic Cementitious Permeable Pavements for Depollution of Contaminants and Impurities in Urban Cities

Tota-Maharaj

Coleman

2017

Proccedings of 10th International Conference "Environmental Engineering"

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“…White surfaces remain white as a result of this self-cleaning effect (Greßler and Gazsó, 2012), and there is some evidence of improved air quality through its use on pavements, tunnels and walls, provided suitable light is available (Allen et al, 2008;Guerrini, 2012;Shen et al, 2012). Although these products have been commercially available for many years (Zhu et al, 2004), there is limited evidence of their use in practice outside of showcase building projects and research studies.…”

Section: Concretementioning

confidence: 99%

“…At the same time, the hydrophilic effect of the coating enables water to spread over the surface and wash away any waste products (Greßler et al, 2010). Thus, surfaces become 'self-cleaning', and there is also potential for the reduction of airborne pollution (Chen and Poon, 2009;Shen et al, 2012).…”

mentioning

confidence: 99%

Nanomaterials in construction – what is being used, and where?

Jones

Gibb

Goodier

et al. 2019

Proceedings of the Institution of Civil Engineers - Constructio

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Identifying where nanomaterials are present in construction materials is challenging. Academic literature reports what nanotechnology can offer construction, but this can differ from the reality of what is currently in use.Furthermore, it is difficult to source accurate information regarding nano-enabled products on the market; under current legislation, the declaration of nano content is voluntary and there is no requirement to provide details within safety data sheets. Although publically available information remains opaque and incomplete, several studies and reports have attempted to clarify this situation. This research builds on this information, presenting an overview of the nano-enabled products currently available for use in construction. This is based on the literature, manufacturers' published information and on discussions with suppliers and end users. Concrete, glass and coatings are the most widely available nano-enabled products, together with insulation and special steels. The precise nanomaterial used in each case however, and the form and quantity involved can be difficult to identify. This makes assessing the risks difficult, which is problematic, as some nanomaterials are considered to be hazardous. More detailed information regarding commercially available products will be important if risks are to be managed, enabling the industry to take full advantage of the benefits of nanotechnology.

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“…Primarily, the current applications deal with low efficiencies that allow the generation of hazardous intermediates during the photocatalytic degradation of pollutants (US Environmental Protection Agency 2012). Consequently, most of the current research focuses on controlling, analyzing, and improving PCO technologies, including photocatalyst and substrate development (Chang et al 2012;Wang et al 2009;Li et al 2010;Debono et al 2013), degradation pathways and kinetics studies (Debono et al 2013), reactor development (Zhang et al 2012), application development (Shen et al 2012), and PCO modeling (Zhong et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Radiation modeling of a photo-reactor using a backward ray-tracing method: an insight into indoor photocatalytic oxidation

Pelzers

Mangkuto

2014

Environ Sci Pollut Res

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Pervious concrete with titanium dioxide as a photocatalyst compound for a greener urban road environment

Cited by 122 publications

References 8 publications

Developing Novel Photocatalytic Cementitious Permeable Pavements for Depollution of Contaminants and Impurities in Urban Cities

Developing Novel Photocatalytic Cementitious Permeable Pavements for Depollution of Contaminants and Impurities in Urban Cities

Nanomaterials in construction – what is being used, and where?

Radiation modeling of a photo-reactor using a backward ray-tracing method: an insight into indoor photocatalytic oxidation

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