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Effects of gas phase composition on competitive adsorption properties of formaldehyde on titanium dioxide-supported platinum in single and mixture compositions

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Abstract
Titanium dioxide-supported platinum (Pt@TiO2) is regarded as a highly efficient photothermal catalyst to degrade various volatile organic compounds (VOCs). To learn more about the hybrid adsorption/catalysis process of VOCs on Pt@ TiO2, their dynamic adsorption behavior on the catalyst surface was studied using the single and multicomponent gas phase of FA (i.e., the latter with four aromatic compounds of benzene, toluene, m-xylene, and styrene (BTXS)) through the control of key operating variables (e.g., VOCs concentration, relative humidity (RH) levels, and dosage). According to the performance evaluation, the doping of TiO2 with Pt metal ions significantly enhanced the FA adsorption capacity (e.g., by 50 % higher than the pristine TiO2) with increased OH (OII) surface active sites (reactivity) and surface porosity. However, in the co-presence of BTXS and water vapor, the adsorption affinity for FA vapor declined by 2 to 3 folds of magnitude with a competitive inhibition of the adsorption interaction on the Pt@TiO2 surface. According to the kinetic and isotherms analysis, a complex, multilayered physicochemical process appears to govern the adsorption of FA molecules onto Pt@TiO2 surface. Overall, the outcomes of this work are helpful to verify the enhanced removal potential of Pt@TiO2 against FA through sequential adsorption and catalytic reaction mechanisms.
Keywords
Titanium oxide (TiO 2 ), Platinum metal catalyst, Volatile organic compounds (VOCs), Gaseous formaldehyde, Competitive adsorption mechanism, VOLATILE ORGANIC-COMPOUNDS, PHOTOCATALYTIC DEGRADATION, ACTIVATED CARBON, REMOVAL, TIO2, OXIDATION, BENZENE, PT/TIO2, KINETICS, PHOTODEGRADATION

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Citation

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MLA
Hua, Yongbiao, et al. “Effects of Gas Phase Composition on Competitive Adsorption Properties of Formaldehyde on Titanium Dioxide-Supported Platinum in Single and Mixture Compositions.” SCIENCE OF THE TOTAL ENVIRONMENT, vol. 892, 2023, doi:10.1016/j.scitotenv.2023.163924.
APA
Hua, Y., Verma, S., Younis, S. A., Heynderickx, P., & Kim, K.-H. (2023). Effects of gas phase composition on competitive adsorption properties of formaldehyde on titanium dioxide-supported platinum in single and mixture compositions. SCIENCE OF THE TOTAL ENVIRONMENT, 892. https://doi.org/10.1016/j.scitotenv.2023.163924
Chicago author-date
Hua, Yongbiao, Swati Verma, Sherif A. Younis, Philippe Heynderickx, and Ki-Hyun Kim. 2023. “Effects of Gas Phase Composition on Competitive Adsorption Properties of Formaldehyde on Titanium Dioxide-Supported Platinum in Single and Mixture Compositions.” SCIENCE OF THE TOTAL ENVIRONMENT 892. https://doi.org/10.1016/j.scitotenv.2023.163924.
Chicago author-date (all authors)
Hua, Yongbiao, Swati Verma, Sherif A. Younis, Philippe Heynderickx, and Ki-Hyun Kim. 2023. “Effects of Gas Phase Composition on Competitive Adsorption Properties of Formaldehyde on Titanium Dioxide-Supported Platinum in Single and Mixture Compositions.” SCIENCE OF THE TOTAL ENVIRONMENT 892. doi:10.1016/j.scitotenv.2023.163924.
Vancouver
1.
Hua Y, Verma S, Younis SA, Heynderickx P, Kim K-H. Effects of gas phase composition on competitive adsorption properties of formaldehyde on titanium dioxide-supported platinum in single and mixture compositions. SCIENCE OF THE TOTAL ENVIRONMENT. 2023;892.
IEEE
[1]
Y. Hua, S. Verma, S. A. Younis, P. Heynderickx, and K.-H. Kim, “Effects of gas phase composition on competitive adsorption properties of formaldehyde on titanium dioxide-supported platinum in single and mixture compositions,” SCIENCE OF THE TOTAL ENVIRONMENT, vol. 892, 2023.
@article{01H8KBG7AJGERYJB9GAHNSZND5,
  abstract     = {{Titanium dioxide-supported platinum (Pt@TiO2) is regarded as a highly efficient photothermal catalyst to degrade various volatile organic compounds (VOCs). To learn more about the hybrid adsorption/catalysis process of VOCs on Pt@ TiO2, their dynamic adsorption behavior on the catalyst surface was studied using the single and multicomponent gas phase of FA (i.e., the latter with four aromatic compounds of benzene, toluene, m-xylene, and styrene (BTXS)) through the control of key operating variables (e.g., VOCs concentration, relative humidity (RH) levels, and dosage). According to the performance evaluation, the doping of TiO2 with Pt metal ions significantly enhanced the FA adsorption capacity (e.g., by 50 % higher than the pristine TiO2) with increased OH (OII) surface active sites (reactivity) and surface porosity. However, in the co-presence of BTXS and water vapor, the adsorption affinity for FA vapor declined by 2 to 3 folds of magnitude with a competitive inhibition of the adsorption interaction on the Pt@TiO2 surface. According to the kinetic and isotherms analysis, a complex, multilayered physicochemical process appears to govern the adsorption of FA molecules onto Pt@TiO2 surface. Overall, the outcomes of this work are helpful to verify the enhanced removal potential of Pt@TiO2 against FA through sequential adsorption and catalytic reaction mechanisms.}},
  articleno    = {{163924}},
  author       = {{Hua, Yongbiao and Verma, Swati and Younis, Sherif A. and Heynderickx, Philippe and Kim, Ki-Hyun}},
  issn         = {{0048-9697}},
  journal      = {{SCIENCE OF THE TOTAL ENVIRONMENT}},
  keywords     = {{Titanium oxide (TiO 2 ),Platinum metal catalyst,Volatile organic compounds (VOCs),Gaseous formaldehyde,Competitive adsorption mechanism,VOLATILE ORGANIC-COMPOUNDS,PHOTOCATALYTIC DEGRADATION,ACTIVATED CARBON,REMOVAL,TIO2,OXIDATION,BENZENE,PT/TIO2,KINETICS,PHOTODEGRADATION}},
  language     = {{eng}},
  pages        = {{14}},
  title        = {{Effects of gas phase composition on competitive adsorption properties of formaldehyde on titanium dioxide-supported platinum in single and mixture compositions}},
  url          = {{http://doi.org/10.1016/j.scitotenv.2023.163924}},
  volume       = {{892}},
  year         = {{2023}},
}

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