Conversion of nitrogen oxides on commercial photocatalytic dispersion paints

Laufs, Sebastian; Burgeth, Gerald; Duttlinger, W.; Kurtenbach, R.; Maban, M.; Thomas, Calvin R.; Wiesen, Peter; Kleffmann, Jörg

doi:10.1016/j.atmosenv.2010.03.038

Cited by 151 publications

(143 citation statements)

References 37 publications

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“…Moreover, it was shown that the interaction of NO 2 with TiO 2 (Monge et al, 2010) and commercial self-cleaning TiO 2 -containing window glass (Langridge et al, 2009) results in the formation of nitrous acid (HONO) in the gas phase, that may have a negative environmental impact (Monge et al, 2010). In contrast, Laufs et al (2010) working with TiO 2 doped commercial paints observed an efficient decomposition of HONO on the photolytic samples and concluded that the paint surfaces do not represent a source of HONO. So the question seems to remain open, pending further studies.…”

Section: Introductionmentioning

confidence: 99%

Interaction of NO2 with TiO2 surface under UV irradiation: measurements of the uptake coefficient

Zein

Bedjanian

2012

Atmos. Chem. Phys.

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Abstract. The interaction of NO 2 with TiO 2 solid films was studied under UV irradiation using a low pressure flow reactor (1-10 Torr) combined with a modulated molecular beam mass spectrometer for monitoring of the gaseous species involved. The NO 2 to TiO 2 reactive uptake coefficient was measured from the kinetics of NO 2 loss on TiO 2 coated Pyrex rods as a function of NO 2 concentration, irradiance intensity (J NO 2 = 0.002-0.012 s −1 ), relative humidity (RH = 0.06-69 %), temperature (T = 275-320 K) and partial pressure of oxygen (0.001-3 Torr). TiO 2 surface deactivation upon exposure to NO 2 was observed. The initial uptake coefficient of NO 2 on illuminated TiO 2 surface (with 90 ppb of NO 2 and J NO 2 ∼ =0.006 s −1 ) was found to be γ 0 = (1.2±0.4) ×10 −4 (calculated using BET surface area) under dry conditions at T = 300 K. The steady state uptake, γ , was several tens of times lower than the initial one, independent of relative humidity, and was found to decrease in the presence of molecular oxygen. In addition, it was shown that γ is not linearly dependent on the photon flux and seems to level off under atmospheric conditions. Finally, the following expression for γ was derived, γ = 2.3×10 −3 exp(-1910/T)/(1 + P 0.36 ) (where P is O 2 pressure in Torr), and recommended for atmospheric applications (for any RH, near 90 ppb of NO 2 and J NO 2 = 0.006 s −1 ).

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Section: Introductionmentioning

confidence: 99%

Interaction of NO2 with TiO2 surface under UV irradiation: measurements of the uptake coefficient

Zein

Bedjanian

2012

Atmos. Chem. Phys.

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“…By applying the rate law of reaction, the rate constant from Laufs, et al [14], and concentrations of NO-NO 2 -O 2 and H 2 O from the site measurements, the average reaction rate during the experiment was 3.49 × 10 -7 M/s. Meanwhile, the nitrate adsorption rate could be calculated from the amount of nitrate formation due to photocatalytic activity divided by the active surface area and exposure duration, as shown in Table 6.…”

Section: Figurementioning

confidence: 99%

“…NO x gas was constantly emitted by vehicles burning fuel on the road. According to Laufs, et al [14], the photocatalytic reaction occurs on the surface of the paving blocks shows first-order kinetics with rate constants k (NO 2 + TiO 2 ) of 0.041 ± 0.007 s -1…”

Section: Figurementioning

confidence: 99%

“…The formation reaction of HNO 3 -by the photocatalytic reaction on the surfaces of the TiO 2 coated paving blocks is represented in Equation (1). According to Laufs, et al [14], the photocatalytic reaction occurs on the surface of the paving blocks followed by first-order kinetics with reaction rate constant k (NO 2 + TiO 2 ) about 0.041 ± 0.007 s …”

Section: Reaction Kineticsmentioning

confidence: 99%

“…The reaction rate was calculated by using the value of k from Laufs, et al [14], and the values of NO, NO 2 , O 2 and H 2 O from the field measurements.…”

Section: Reaction Kineticsmentioning

confidence: 99%

See 2 more Smart Citations

Development of Green Pavement for Reducing Oxides of Nitrogen (NOx) in the Ambient Air

Dewi

Khair

Irsyad

2016

J. Eng. Technol. Sci.

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Abstract. The transportation sector is the biggest contributor to air pollution in Indonesia, especially in metropolitan cities. Gases such as oxides of nitrogen (NO x ) are produced during the combustion of fossil fuels in the internal combustion of vehicle engines. Oxides of nitrogen such as nitric oxide (NO) and nitrogen dioxide (NO 2 ) are important air pollutants, because they cause significant harm to human health and play an important role in being precursors of other dangerous pollutants such as photochemical smog. One of the simple ways to reduce NO x concentrations is utilizing a catalytic process involving UV light and semiconductor particles such as TiO 2 . Illuminated TiO 2 UV light is capable of producing an electron (e -) and hole (h -) pair, which initiates a chemical reaction that alters the NO x to become NO 3 -or NO 2 -. A field scale paving block reactor coated with TiO 2 placed by the roadside was exposed to UV light using various exposure times. The results showed that the sample with a composition of 200 g/m 2 TiO 2 was capable of adsorbing NO x gas at an average rate of 0.0046 mg/m 2 /minute. Additional costs due to TiO 2 coating for every square meter of paving are IDR 13,180.

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Photocatalytic NO _x Abatement

Bloh

2021

Heterogeneous Photocatalysis

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Conversion of nitrogen oxides on commercial photocatalytic dispersion paints

Cited by 151 publications

References 37 publications

Interaction of NO<sub>2</sub> with TiO<sub>2</sub> surface under UV irradiation: measurements of the uptake coefficient

Interaction of NO<sub>2</sub> with TiO<sub>2</sub> surface under UV irradiation: measurements of the uptake coefficient

Development of Green Pavement for Reducing Oxides of Nitrogen (NOx) in the Ambient Air

Photocatalytic NO _x Abatement

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Conversion of nitrogen oxides on commercial photocatalytic dispersion paints

Cited by 151 publications

References 37 publications

Interaction of NO&lt;sub&gt;2&lt;/sub&gt; with TiO&lt;sub&gt;2&lt;/sub&gt; surface under UV irradiation: measurements of the uptake coefficient

Interaction of NO&lt;sub&gt;2&lt;/sub&gt; with TiO&lt;sub&gt;2&lt;/sub&gt; surface under UV irradiation: measurements of the uptake coefficient

Development of Green Pavement for Reducing Oxides of Nitrogen (NOx) in the Ambient Air

Photocatalytic NO x Abatement

Contact Info

Product

Resources

About

Interaction of NO<sub>2</sub> with TiO<sub>2</sub> surface under UV irradiation: measurements of the uptake coefficient

Interaction of NO<sub>2</sub> with TiO<sub>2</sub> surface under UV irradiation: measurements of the uptake coefficient

Photocatalytic NO _x Abatement