Acetaldehyde adsorption on TiO2: Influence of NO2 preliminary adsorption

Thévenet, F.; Olivier, Louis; Batault, F.; Locoge, N.

doi:10.1016/j.cej.2015.06.084

Cited by 20 publications

(20 citation statements)

References 31 publications

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“…Nitrogen adsorption measurements are performed with a laboratory gas sorption analysis system , and the Autosorb-1MP Quantachrome sorption analyzer. The SSA of the collected dust samples is determined employing the BET method within 0.05–0.3 relative pressure range ( P / P 0 ).…”

Section: Methodsmentioning

confidence: 99%

Water Interaction with Mineral Dust Aerosol: Particle Size and Hygroscopic Properties of Dust

Ibrahim

Romanías

Alleman

et al. 2018

ACS Earth Space Chem.

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For many years, the interaction between dust particles and water molecules has been a subject of interest for the atmospheric sciences community. However, the influence of the particle size on the hygroscopicity of mineral particles is poorly evaluated. In the current study, diffused reflectance infrared Fourier transform (DRIFT) spectroscopy is used to evaluate the in situ water adsorption on natural Arizona test dust (ATD) particles. Five different ATD size fractions, 0−3, 5−10, 10−20, 20−40, and 40−80 μm, are used, corresponding to the entire range of uplifted mineral particles in the atmosphere (<100 μm). N 2 sorption measurement, particle size distribution, and elemental analyses are performed to determine the physicochemical properties of the samples. The water adsorption experiments are conducted in an optical cell under flow conditions at room temperature and under the relative humidity (RH) range of 2− 90%. Experimental results are simulated with a modified three-parameter Brunauer−Emmett−Teller (BET) equation. Water monolayers are found to be formed at 13

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Section: Methodsmentioning

confidence: 99%

Water Interaction with Mineral Dust Aerosol: Particle Size and Hygroscopic Properties of Dust

Ibrahim

Romanías

Alleman

et al. 2018

ACS Earth Space Chem.

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“…The experimental setup used in the present study to investigate both the gas and adsorbed phases during AcA uptake on Gobi dust consists of three main parts: (i) a gas flow preparation system, (ii) a U-shape flow-through reactor coupled with a transmission FTIR spectrophotometer for gas-phase analysis, and (iii) a DRIFT spectroscopy optical sample cell for surface monitoring, as illustrated in Figure . These experimental setups and the approaches used have been extensively deployed in the past to study the heterogeneous interactions/reactions of organic and inorganic compounds on the surface of dust and catalysts. ,,− …”

Section: Methodsmentioning

confidence: 99%

Uptake Mechanism of Acetic Acid onto Natural Gobi Dust

Wang

Romanías

Pei

et al. 2020

ACS Earth Space Chem.

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A challenge for understanding the environmental fate of atmospheric organic acids is to evaluate the impacts of their heterogeneous interactions with mineral dust aerosols in the atmosphere. However, the uptake of organic acids on authentic natural mineral dust is rarely investigated under atmosphere-relevant conditions. Herein, we investigated the uptake of acetic acid (AcA) onto a natural mineral dust from the Gobi Desert, Gobi dust, under atmosphere-relevant conditions, combining both the gas-phase and adsorbed-phase approaches. Gobi dust is evidenced to reversibly and irreversibly adsorb AcA molecules under both dry and humid conditions. In the presence of moisture, the fraction of the reversibly adsorbed AcA is promoted, which addresses the impact of water molecules with AcA on minerals. Physisorbed AcA monomer, dimer, and chemisorbed acetate are identified based on real-time surface monitoring using diffuse reflectance infrared Fourier transform spectroscopy. This study provides original data and insights into the impacts of heterogeneous interactions with mineral dust on the environmental fate of acetic acid. It also provides complete and visual mechanisms for a comprehensive understanding of the involved surface reactions. This study initiates the exploration of the heterogeneous kinetics of the fractions of reversibly and irreversibly adsorbed AcA on natural mineral dust under atmospheric conditions.

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“…It should be mentioned that a number of VOCs could undergo reactive adsorption on metal oxides during the uptake step. This point has been clearly stated by Arsac et al [10], Batault et al [11], Thevenet et al [12] and Barakat et al [13]. It means that the performance of the plasma-catalytic system cannot be solely predicted from the reactivity of ozone with the primary VOC to be treated, since a variety of VOC byproducts, resulting from condensation or dissociation surface processes, can be present on the material as the plasma is ignited.…”

Section: Introductionmentioning

confidence: 97%

Adsorption of VOCs Is a Key Step in Plasma-Catalyst Coupling: The Case of Acetone onto TiO2 vs. CeO2

et al. 2021

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If a number of literature studies point at the positive role of coupling materials with non-thermal plasma, particularly for Volatile Organic Compounds (VOC) removal, most of them focus on the direct plasma-material interaction to understand the coupling. However, a key contribution relies in the VOC–material interaction. Therefore, this study focuses on the adsorption step of targeted VOCs to provide a new insight on plasma–material coupling. The adsorption of acetone, used as probe VOC, is explored on two widespread coupling materials: TiO2 and CeO2. First, their behaviors are compared regarding acetone uptake. This process is reactive and creates other organic species than acetone on both surfaces. Second, the metal oxide behaviors are compared regarding ozone uptake. Interestingly, under typical VOC treatment configuration, i.e., with organics on their surfaces, ozone uptake is driven by the adsorbed organics, not directly by the metal oxides anymore. Finally, the ozonation of both materials, preliminary exposed to acetone, is explored through the evolution of the adsorbed organics and the corresponding mineralization, i.e., CO and CO2 formation. It evidences that the reactive adsorption of VOCs plays a key role in making the surface organics ready for an efficient oxidation and mineralization under post-plasma exposure.

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Acetaldehyde adsorption on TiO2: Influence of NO2 preliminary adsorption

Cited by 20 publications

References 31 publications

Water Interaction with Mineral Dust Aerosol: Particle Size and Hygroscopic Properties of Dust

Water Interaction with Mineral Dust Aerosol: Particle Size and Hygroscopic Properties of Dust

Uptake Mechanism of Acetic Acid onto Natural Gobi Dust

Adsorption of VOCs Is a Key Step in Plasma-Catalyst Coupling: The Case of Acetone onto TiO2 vs. CeO2

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