Photocatalytic degradation of ethylbenzene in gas phase over N or NF doped TiO2 catalysts

Cherni, Dhia; Moussa, Noomen; Nsib, Mohamed Faouzi; Olivo, Alberto; Signoretto, Michela; Prati, Laura; Villa, Alberto

doi:10.1007/s10854-019-02248-2

Cited by 4 publications

(2 citation statements)

References 47 publications

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“…Different behavior was observed in the case of semicarbazide [22] and N,N-dimethyl urea [22] as nitrogen precursors. In these cases, the doping process was promoting the rutilization of TiO 2 even at calcination temperatures as low as 500 • C. Divergent results in the described range were noted in the case of urea as a nitrogen precursor: in calcination at 500 • C [22], 400 • C [23,24], and 300 • C [25], there were no significant XRD differences; in Yadav et al's case, in calcination at 400 • C, clear rutile signals were observed [26]. The above-mentioned materials were synthesized with the use of the sol-gel method.…”

Section: Catalysts Characterizationmentioning

confidence: 98%

Acesulfame K Photodegradation over Nitrogen-Doped TiO2

et al. 2021

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Acesulfame K is a zero-calorie alternative to sugar used worldwide. There is contradictory information on the toxicity of the compound, but its accumulation in the aquatic environment is undeniable. In this study, one-pot sol-gel synthesis was used to obtain nitrogen-doped TiO2 photocatalysts. Doping up to 6.29 wt % of nitrogen caused an increase in the surface area of the catalysts (48.55–58.23 m2∙g−1) and a reduction of the pHPZC value (5.72–5.05). Acesulfame K photodegradation was tested at the initial concentration of 20–100 ppm and the catalyst concentration at the level of 1 g∙L−1. Compared to the pure anatase, 4.83–6.29 wt % nitrogen-doped TiO2 showed an effective photodegradation of Acesulfame K. Ninety percent molecule removal was obtained after ~100 min, ~90 min, and ~80 min for initial concentrations of 20 ppm, 50 ppm, and 100 ppm, respectively. The increased activity of the catalysts is due to the modification of the TiO2 lattice structure and probably the limitation of the photogenerated electron/hole charge carrier recombination. It was shown that the electrostatic interactions between Acesulfame K and the catalyst surface play an important role in the photodegradation efficiency.

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Section: Catalysts Characterizationmentioning

confidence: 98%

Acesulfame K Photodegradation over Nitrogen-Doped TiO2

et al. 2021

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“…The second one is a ring-opening pathway to producemucoaldehyde which will further decomposes rapidly. Although this study did not analyze any intermediate compounds; however, referring to photocatalytic oxidation of benzene with TiO 2 , it is certain that benzene is converted to less harmful compounds which will finally result in formation of carbondioxide and water as end products [32,33,34,35].…”

Section: Photo-catalytic Degradation Of Gaseous Benzenementioning

confidence: 98%

Natural rubber modification as a pre-vulcanized latex impregnated with TiO2 for photo-catalytic degradation of gaseous benzene

Kaoien

Dechapanya

Khamwichit

et al. 2020

Heliyon

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Photocatalytic oxidation purposes an economical and environmental friendly process to remove benzene from indoor air pollution. However, the process efficiency is primarily dependent on catalytic-film. The main purpose of this study is to synthesize pre-vulcanized latex impregnated with TiO 2 (PVL-TiO 2 thin film) from natural rubber to be used in photo-catalytic oxidation for benzene removal in a reactor. PVL-TiO 2 thin films were synthesized for 3 different dosages of TiO 2 , which were 5%, 15%, and 25% The outcome of this study offers the new application of modified natural rubber in terms of environmental and health care protection. Morphology of the synthesized films was analyzed by SEM. The results showed that TiO 2 particles could be well dispersed all over the surface of the film, in which the best distribution could be found for the PVL-TiO 2 15% thin film. Tensile stress of the films was analyzed using ASTM D412. Results showed that the stress of the films got higher with the increasing amount of TiO 2 content. This indicates that TiO 2 strengthened the PVL-TiO 2 film because the uniformly distribution of TiO 2 on the inner surface increased the strength of the film. The decomposition of PVL and PVL-TiO 2 thin films was analyzed using thermo gravimetric analysis. The maximum weight loss rates in the range of 1.536-1.145 wt %/ C attained at between 380 -382 C TiO 2 particles enhanced thermal stability of PVL-TiO 2 thin films due to the high decomposition temperature of its properties and also acted as barrier for the heat transfer of the films. Specific surface area (SSA) of the films was analyzed using Brunauer-Emmett-Teller. Specific surface area increased as the increasing content of TiO 2 , which corresponded to the morphology analysis by SEM. The analysis of chemical functional group of thin films was performed using ATR-FTIR. The results of Crystal identification using XRD clearly showed good attachment of rutile TiO 2 on the films. Finally, results of absorbance spectrums and band gap energy showed that PVL not only peg TiO 2 particles but also reducing band gap energy which induced by S and ZnO. Therefore, PVL-TiO 2 thin films could be used under visible light condition. The films were then used in the study of benzene removal in annular reactor. The highest removal efficiency (83%)for the PVL-TiO 2 15% thin film was obtained. Comparing to the maximum removal efficiency for PVL film (28%), roughly 60% increase in efficiency was achieved. The PCO kinetics were well fit by a first order Langmuir-Hinshelwood model. The calculation of oxidation rate and percentage of residual intermediates indicated that accumulation of residual intermediates can occur on the active site and the gas phase, resulting in increasing of residual intermediates. The successful synthesis of PVL-TiO 2 thin film provides new opportunity to use natural rubber in terms of environmental and health care protection.

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Recent advances of photocatalytic degradation for BTEX: Materials, operation, and mechanism

Liang

et al. 2023

Chemical Engineering Journal

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Photocatalytic degradation of ethylbenzene in gas phase over N or NF doped TiO2 catalysts

Cited by 4 publications

References 47 publications

Acesulfame K Photodegradation over Nitrogen-Doped TiO2

Acesulfame K Photodegradation over Nitrogen-Doped TiO2

Natural rubber modification as a pre-vulcanized latex impregnated with TiO2 for photo-catalytic degradation of gaseous benzene

Recent advances of photocatalytic degradation for BTEX: Materials, operation, and mechanism

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