Photocatalytic degradation of toluene in the gas phase: comparative study of some TiO2 supports

Bouzaza, Abdelkrim; Laplanche, A.

doi:10.1016/s1010-6030(02)00088-6

Cited by 84 publications

(45 citation statements)

References 10 publications

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“…All of the analyses were performed in triplicate at pH = 6.0. Experiments were conducted in a 10 × 10 × 100 cm 3 lab-made reactor for 5 h using a UVC lamp (λ = 254 nm) [20]. One test was performed under the same conditions without a photocatalyst for the measurement of the photolysis.…”

Section: Photocatalysis and Adsorption Testsmentioning

confidence: 99%

Sr1−xBaxSnO3 system applied in the photocatalytic discoloration of an azo-dye

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Bouquet

Députier

et al. 2014

Solid State Sciences

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Semiconductor materials have received substantial attention as photocatalysts for controlling water pollution. Among these materials, perovskite-structured SrSnO 3 is a promising candidate for this application, whereas BaSnO 3 exhibits very low activity. In the present work, Sr 1-x Ba x SnO 3 (x = 0, 0.25, 0.50, 0.75 and 1) was synthesized by solid-state reaction and was applied in the photocatalytic discoloration of the organic dye Remazol Golden Yellow. The perovskite structure was obtained for all compositions of the solid solutions with both Sr The two materials appear to feature different mechanisms of photodegradation: the direct mechanism prevails in the case of BaSnO 3 , whereas the indirect mechanism appears to play a key role in the case of SrSnO 3 .

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Section: Photocatalysis and Adsorption Testsmentioning

confidence: 99%

Sr1−xBaxSnO3 system applied in the photocatalytic discoloration of an azo-dye

Sales

Bouquet

Députier

et al. 2014

Solid State Sciences

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“…Experiments presented in the relevant literature usually applied monochromatic lamps with 254 nm for toluene removal [12,[20][21]. The power flux varies depending on the construction of a photoreactor, and is not always specified.…”

Section: Resultsmentioning

confidence: 99%

“…Toluene is very often chosen as a model pollutant in photocatalytical processes, which is very advantageous in terms of comparing obtained results. The photodegradation efficiency of toluene in the presence of titania-based photocatalysts may even reach 100% [12][13]. Toluene is one of the typical indoor volatile organic compounds, as well as a member of the BTEX group.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytical Degradation of Toluene and Cyclohexane Using LED Illumination

Mioduska¹,

Zielińska‐Jurek²,

Hupka³

2017

Pol. J. Environ. Stud.

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A sol-gel process followed by hydrothermal reaction was used to prepare coupled WO 3 -TiO 2 photocatalysts with varying amounts of WO 3 in respect to TiO 2 (3 mol% and 5 mol% respectively). Additionally, photocatalysts have been subjected to different calcination temperatures of 400ºC and 800ºC, which allowed us to compare how these affect photodegradation efficiency. Photocatalysts were characterized under a scanning electron microscope, x-ray diffraction, and by measuring BET surface area. Photocatalytic tests have been carried out following the degradation of toluene and cyclohexane in the gas phase under LED UV light (375 nm). Elevated calcination temperature turned to enhance photocatalytical efficiency of coupled WO 3 -TiO 2 while degrading the model pollutant cyclohexane. It was demonstrated that light emitting diodes (LEDs) can be used effectively as a source of illumination in photoreactors, sufficient to obtain 90% compound elimination from the air during 15 minutes of illumination while applying a wellmatched photocatalyst.

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“…[35] reported the irreversible fraction of toluene as 0.77 ± 0.29 μmol/m 2 onto P25-Degussa TiO2 for the same concentration range of toluene. Bouzaza et al [36] reported that the total adsorbed amount of toluene on TiO2 is 3.9 μmol/m 2 . Similarly, Takeuchi et al [37] reported values ranging from 2 to 3 μmol/m 2 for toluene adsorption on zeolites.…”

Section: Characterization Of the Adsorption Of 100 Ppm Of Toluene On mentioning

confidence: 99%

Plasma-Catalytic Mineralization of Toluene Adsorbed on CeO2

et al. 2018

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Abstract:In the context of coupling nonthermal plasmas with catalytic materials, CeO 2 is used as adsorbent for toluene and combined with plasma for toluene oxidation. Two configurations are addressed for the regeneration of toluene saturated CeO 2 : (i) in plasma-catalysis (IPC); and (ii) post plasma-catalysis (PPC). As an advanced oxidation technique, the performances of toluene mineralization by the plasma-catalytic systems are evaluated and compared through the formation of CO 2 . First, the adsorption of 100 ppm of toluene onto CeO 2 is characterized in detail. Total, reversible and irreversible adsorbed fractions are quantified. Specific attention is paid to the influence of relative humidity (RH): (i) on the adsorption of toluene on CeO 2 ; and (ii) on the formation of ozone in IPC and PPC reactors. Then, the mineralization yield and the mineralization efficiency of adsorbed toluene are defined and investigated as a function of the specific input energy (SIE). Under these conditions, IPC and PPC reactors are compared. Interestingly, the highest mineralization yield and efficiency are achieved using the in-situ configuration operated with the lowest SIE, that is, lean conditions of ozone. Based on these results, the specific impact of RH on the IPC treatment of toluene adsorbed on CeO 2 is addressed. Taking into account the impact of RH on toluene adsorption and ozone production, it is evidenced that the mineralization of toluene adsorbed on CeO 2 is directly controlled by the amount of ozone produced by the discharge and decomposed on the surface of the coupling material. Results highlight the key role of ozone in the mineralization process and the possible detrimental effect of moisture.

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Photocatalytic degradation of toluene in the gas phase: comparative study of some TiO2 supports

Cited by 84 publications

References 10 publications

Sr1−xBaxSnO3 system applied in the photocatalytic discoloration of an azo-dye

Sr1−xBaxSnO3 system applied in the photocatalytic discoloration of an azo-dye

Photocatalytical Degradation of Toluene and Cyclohexane Using LED Illumination

Plasma-Catalytic Mineralization of Toluene Adsorbed on CeO2

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