An efficient TiO2 thin-film photocatalyst: photocatalytic properties in gas-phase acetaldehyde degradation

Sopyan, Iis; Watanabe, M.; Murasawa, Sadao; Hashimoto, Kazuhito; Fujishima, Akira

doi:10.1016/1010-6030(96)04328-6

Cited by 417 publications

(198 citation statements)

References 36 publications

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“…It is evident from these results that the reactivity in the first cycle differs significantly from that in the subsequent experimental cycles. Although previous reports on rate constants and quantum yield for the individual photoreactions steps for the photo-oxidation of acetaldehyde on TiO 2 are lacking, our results for the reaction rates and quantum yield in the first reaction cycle 1 shown in Table 2 compare well with the values reported by Kim and Choi [39], and Sopyan et al [40]. Clearly, the reaction rate decreases after the first cycle, and the formation of side products other than formate is suppressed.…”

supporting

confidence: 81%

Adsorption and photo-oxidation of acetaldehyde on TiO2 and sulfate-modified TiO2: Studies by in situ FTIR spectroscopy and micro-kinetic modeling

Topalian

Stefanov

Granqvist

et al. 2013

Journal of Catalysis

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Adsorption and photocatalytic oxidation of acetaldehyde have been investigated on TiO 2 and sulphate-modified TiO 2 films (denoted SO 4 -TiO 2 ). In situ Fourier transform infrared spectroscopy was used to study surface reactions as a function of time and number of experimental cycles. Spectral analysis and micro-kinetic modelling show that crotonaldehyde formation occurs spontaneously on TiO 2 but is impeded on SO 4 -TiO 2 , where instead acetaldehyde desorption is significant. Photo-oxidation yields significant amounts of formate on TiO 2 , and was identified as the rate-determining step and associated with site blocking.Significantly smaller amounts of formate were observed on SO 4 -TiO 2 , which is due to the acidity of this surface resulting in weaker bonding of aldehyde and carboxylate intermediate species. Our results are of considerable interest for applications to photocatalytic air purification and to surfaces with controlled wettability.

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supporting

confidence: 81%

Adsorption and photo-oxidation of acetaldehyde on TiO2 and sulfate-modified TiO2: Studies by in situ FTIR spectroscopy and micro-kinetic modeling

Topalian

Stefanov

Granqvist

et al. 2013

Journal of Catalysis

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“…The application of TiO 2 , in the photoactive crystal form anatase, as air purifying material originated in Japan in 1996 (see e.g. [6]). Since then, a broad spectrum of products appeared on the market for indoor use as well as for outdoor applications.…”

Section: Heterogeneous Photocatalysis a Process For Air Purificationmentioning

confidence: 99%

Photocatalytic roads: from lab tests to real scale applications

Boonen

Beeldens

2012

Eur. Transp. Res. Rev.

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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.

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“…However, film-type photocatalysts normally have lower surface areas than powdered ones, and the intrinsic photocatalytic activity of films is usually less than that of powders. [9,10] In this work, anatase TiO 2 nanoparticles were synthesised by the solÀgel method and its photocatalytic activity in the degradation of MO was studied. The samples were annealed at various temperatures, and at 800 C the anatase phase completely transformed into rutile which was confirmed by X-ray diffraction (XRD) and micro Raman analysis.…”

Section: Introductionmentioning

confidence: 99%

Solar photocatalytic degradation of methyl orange dye using TiO₂nanoparticles synthesised by sol–gel method in neutral medium

Subha

Jayaraj

2014

Journal of Experimental Nanoscience

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An efficient TiO2 thin-film photocatalyst: photocatalytic properties in gas-phase acetaldehyde degradation

Cited by 417 publications

References 36 publications

Adsorption and photo-oxidation of acetaldehyde on TiO2 and sulfate-modified TiO2: Studies by in situ FTIR spectroscopy and micro-kinetic modeling

Adsorption and photo-oxidation of acetaldehyde on TiO2 and sulfate-modified TiO2: Studies by in situ FTIR spectroscopy and micro-kinetic modeling

Photocatalytic roads: from lab tests to real scale applications

Solar photocatalytic degradation of methyl orange dye using TiO₂nanoparticles synthesised by sol–gel method in neutral medium

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An efficient TiO2 thin-film photocatalyst: photocatalytic properties in gas-phase acetaldehyde degradation

Cited by 417 publications

References 36 publications

Adsorption and photo-oxidation of acetaldehyde on TiO2 and sulfate-modified TiO2: Studies by in situ FTIR spectroscopy and micro-kinetic modeling

Adsorption and photo-oxidation of acetaldehyde on TiO2 and sulfate-modified TiO2: Studies by in situ FTIR spectroscopy and micro-kinetic modeling

Photocatalytic roads: from lab tests to real scale applications

Solar photocatalytic degradation of methyl orange dye using TiO2nanoparticles synthesised by sol–gel method in neutral medium

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Product

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Solar photocatalytic degradation of methyl orange dye using TiO₂nanoparticles synthesised by sol–gel method in neutral medium