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MnOx/TiO2 Catalysts for VOCs Abatement by Coupling Non-thermal Plasma and Photocatalysis

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Abstract

Mn3O4 with different particle sizes was prepared and mixed with titanium oxide to prepare catalytic systems. Those systems were characterized and then used for ethanol removal from air. Commercial β-MnO2 was also used for comparison. Prepared solids were characterized by X-ray Diffraction, N2-physisorption, Raman, Scanning Electron Microscopy and Photoluminescence. MnOx/TiO2 catalysts were tested in the ethanol oxidation reaction (at low concentration: 30 ppm) under ultraviolet light and under non-thermal plasma (Espe = 14 J L−1). The combination of those both technologies was also tested. This study shows that the combination of photocatalysis and non-thermal plasma enhances significantly the oxidation of ethanol. Indeed, very high ethanol conversion rate was obtained with an important carbon dioxide selectivity and low residual ozone concentration. Besides, well dispersed nanoparticles of Mn3O4 are more efficient than β-MnO2 microparticles in the minimization of undesirable byproduct. Actually, under combined ultraviolet light and non-thermal plasma the O3 activation seems to be more efficient on Mn3O4, which additionally enhances the ethanol decomposition and the CO2 selectivity.

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Acknowledgments

We acknowledge the Tunisian Ministry of High Education, Scientific Research and Technology for the Ph.D. mobility grant of Imen Aouadi, Houcine Touati for efficient help in plasma experiments and Dr. Mehrez Hermassi for SEM images achieving.

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Authors and Affiliations

  1. Laboratoire de Chimie des Matériaux et Catalyse, Faculté des Sciences de Tunis, Université Tunis El Manar, Tunis, Tunisia

    I. Aouadi & L. Bergaoui

  2. Institut de Chimie des Milieux et Matériaux de Poitiers, UMR CNRS 7285, Université de Poitiers, Ecole Nationale Supérieure d’Ingénieurs de Poitiers, Poitiers, France

    J.-M. Tatibouët

  3. Institut National des Sciences Appliquées et de Technologie, Université de Carthage, Centre Urbain Nord, BP 676, Tunis, Tunisia

    L. Bergaoui

Authors
  1. I. Aouadi
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  2. J.-M. Tatibouët
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  3. L. Bergaoui
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Correspondence to L. Bergaoui.

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Aouadi, I., Tatibouët, JM. & Bergaoui, L. MnOx/TiO2 Catalysts for VOCs Abatement by Coupling Non-thermal Plasma and Photocatalysis. Plasma Chem Plasma Process 36, 1485–1499 (2016). https://doi.org/10.1007/s11090-016-9740-3

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  • DOI: https://doi.org/10.1007/s11090-016-9740-3

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