Heterogeneous photocatalytic removal of toluene from air on building materials enriched with TiO2

Demeestere, Kristof; Dewulf, Jo; Witte, Bruno De; Beeldens, Anne; Langenhove, Herman Van

doi:10.1016/j.buildenv.2007.01.016

Cited by 149 publications

(74 citation statements)

References 38 publications

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“…However, the length of this initial region is estimated to be small compared to the total length of each reactor since the difference between the two curves is only ~10% or less, comparable to the average experimental error on X. The observed increase in conversion with residence time is consistent with previously reported results [14]. The observed first-order reaction is consistent with the limiting case of a langmuirian rate equation of toluene oxidation when the concentration of toluene approaches very low values.…”

Section: Effect Of Air Flow Rate and Residence Time On Toluene Removalsupporting

confidence: 89%

“…Recently, a few studies investigated the removal performance of UVPCO at low VOC concentrations comparable to those encountered in buildings [11][12][13][14][15]. With VOC concentrations in the ppbv range, the low catalyst surface coverage led to different kinetics and mechanisms with respect to reactions using high gas phase concentrations (in the ppmv range), and the competition between different VOCs for reactive surface sites was shown to be insignificant.…”

Section: Introductionmentioning

confidence: 99%

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Effect of key parameters on the photocatalytic oxidation of toluene at low concentrations in air under 254+185nm UV irradiation

Quici

Vera

Choi

et al. 2010

Applied Catalysis B: Environmental

106

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Section: Effect Of Air Flow Rate and Residence Time On Toluene Removalsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Effect of key parameters on the photocatalytic oxidation of toluene at low concentrations in air under 254+185nm UV irradiation

Quici

Vera

Choi

et al. 2010

Applied Catalysis B: Environmental

106

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“…Therefore, the benefits derived from its application have been considered, i.e., the abatement of inorganic and organic substances (e.g., NO x and toluene emissions). In particular, an abatement of 4.01 mg/h·m 2 for NO x substance (studied by Chen and Poon [4]) and a reduction of 100 mg/h·m 2 for toluene emission (proposed by Demeestere [42]) were taken into account. To evaluate the reduction in concentration of these substances in the LCA studies, negative values were considered as input data.…”

Section: Goal and Scope Definitionmentioning

confidence: 99%

Assessment of Environmental Performance of TiO2 Nanoparticles Coated Self-Cleaning Float Glass

et al. 2017

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Abstract:In recent years, superhydrophilic and photocatalytic self-cleaning nanocoatings have been widely used in the easy-to-clean surfaces field. In the building sector, self-cleaning glass was one of the first nanocoating applications. These products are based on the photocatalytic property of a thin layer of titanium dioxide (TiO 2 ) nanoparticles deposited on the surface of any kind of common glass. When exposed to UV radiation, TiO 2 nanoparticles react with the oxygen and water molecules adsorbed on their surface to produce radicals leading to oxidative species. These species are able to reduce or even eliminate airborne pollutants and organic substances deposited on the material's surface. To date, TiO 2 nanoparticles' benefits have been substantiated; however, their ecological and human health risks are still under analysis. The present work studies the ecodesign of the industrial scale-up of TiO 2 nanoparticles self-cleaning coated float glass production performed by the life cycle assessment (LCA) methodology and applies new human toxicity indicators to the impact assessment stage. Production, particularly the TiO 2 nanoparticle application, is the life cycle phase most contributing to the total damage. According to the ecodesign approach, the production choices carried out have exacerbated environmental burdens.

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“…Concrete pavement surfaces and external building surfaces constitute optimal media for the application of photocatalytic materials than can reduce air pollution in indoor and outdoor environments. A number of laboratory studies (Strini et al [7], Poon and Cheung [8], Demeestere et al [9]) as well as several pilot projects can nowadays affirm the de-pollution effectiveness of such photocatalytic building materials. Furthermore, it is proven that even in real complex site conditions, the photocatalytic air purification effect of the (photocatalytic) construction materials (cementitious layer) remains effective (Guerrini and Peccati [10], Beeldens [11]).…”

Section: Introductionmentioning

confidence: 98%

Photocatalytic removal of NO using TiO₂-containing ceramic tiles: evaluation under different reactor’s operational mode

et al. 2012

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Construction materials that incorporate into their structures photocatalysts are found to exhibit a capacity in removing NO from air. Therefore, the development of such innovative materials with both de-soiling and de-polluting properties is a significant step towards the improvement of indoor and outdoor air quality.It is the purpose of this study to investigate the photocatalytic removal of dominant urban air pollutant (NO) using TiO 2 -modified ceramic tiles under both static and dynamic conditions. The activity of 4 types of these materials was investigated in an environmental chamber (0.125m 3 ) under a realistic level of irradiation, humidity and compound amount with reference to a typical urban air pollutant concentration. The photocatalytic performance of the materials was evaluated through the calculation of two parameters: the a) photocatalytic decomposition percentage (PD %) and the b) photocatalytic rate (PR μg m -2 s -1 ) Results showed that building materials, such as ceramic tiles, when treated with different layers of 10% TiO 2 , can be used for the photocatalytic removal of air pollutants under "real" world conditions. A NO degradation percentage high as 75%, and a decomposition rate the size of 0.65 μg m -2 s -1 were reported for the 4-layer TiO 2 material under static mode, whereas the corresponding parameters were found to be 50% and 0.63 μgm -2 s -1 respectively in the dynamic system. Overall, it was exhibited that the PR parameter presented the same trend and level under both operational modes for all materials, whereas the %PD parameter displayed higher values when studied under static mode.

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Heterogeneous photocatalytic removal of toluene from air on building materials enriched with TiO2

Cited by 149 publications

References 38 publications

Effect of key parameters on the photocatalytic oxidation of toluene at low concentrations in air under 254+185nm UV irradiation

Effect of key parameters on the photocatalytic oxidation of toluene at low concentrations in air under 254+185nm UV irradiation

Assessment of Environmental Performance of TiO2 Nanoparticles Coated Self-Cleaning Float Glass

Photocatalytic removal of NO using TiO₂-containing ceramic tiles: evaluation under different reactor’s operational mode

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Heterogeneous photocatalytic removal of toluene from air on building materials enriched with TiO2

Cited by 149 publications

References 38 publications

Effect of key parameters on the photocatalytic oxidation of toluene at low concentrations in air under 254+185nm UV irradiation

Effect of key parameters on the photocatalytic oxidation of toluene at low concentrations in air under 254+185nm UV irradiation

Assessment of Environmental Performance of TiO2 Nanoparticles Coated Self-Cleaning Float Glass

Photocatalytic removal of NO using TiO2-containing ceramic tiles: evaluation under different reactor’s operational mode

Contact Info

Product

Resources

About

Photocatalytic removal of NO using TiO₂-containing ceramic tiles: evaluation under different reactor’s operational mode