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Synergistic Effect of Dielectric Barrier Discharge Plasma and TiO2-Pillared Montmorillonite on the Degradation of Rhodamine B in an Aqueous Solution

1
Ivanovo State University of Chemistry and Technology, 153000 Ivanovo, Russia
2
Industrial Laboratory, SCAMT Institute, ITMO University, 191002 Saint Petersburg, Russia
3
Department of Chemistry and Biochemistry, University of Bern, 3012 Bern, Switzerland
*
Author to whom correspondence should be addressed.
Catalysts 2020, 10(4), 359; https://doi.org/10.3390/catal10040359
Received: 3 March 2020 / Revised: 20 March 2020 / Accepted: 22 March 2020 / Published: 25 March 2020
(This article belongs to the Special Issue Recent Advances in TiO2 Photocatalysts)
Photocatalytic, plasma and combined plasma–photocatalytic processes were applied for the destruction of a model pollutant, Rhodamine B dye, in an aqueous solution (concentration of 40 mg/L). For this purpose TiO2-pillared montmorillonite was used as a photocatalyst (characterized by X-ray analysis and low-temperature nitrogen adsorption/desorption). It was prepared by the method of intercalation of titanium hydroxocomplexes, including hydrothermal activation of the process and preliminary mechanical treatment of the layered substrate. The dielectric barrier discharge (DBD) plasma in the presence of photocatalysts increases the efficiency of dye degradation (100%, 8 s) compared to plasmolysis (94%) and UV photolysis (92%, 100 min of UV irradiation); in contrast to photolysis, destructive processes are more profound and lead to the formation of simple organic compounds such as carboxylic acids. The plasma–catalytic method enhances by 20% the energetic efficiency of the destruction of Rhodamine B compared to DBD plasma. The efficiency of dye destruction with the plasma–catalytic method increases with the improvement of the textural properties of the photocatalyst. View Full-Text
Keywords: photocatalysis; titanium dioxide; dielectric barrier discharge plasma; water treatment; Rhodamine B photocatalysis; titanium dioxide; dielectric barrier discharge plasma; water treatment; Rhodamine B
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MDPI and ACS Style

Butman, M.F.; Gushchin, A.A.; Ovchinnikov, N.L.; Gusev, G.I.; Zinenko, N.V.; Karamysheva, S.P.; Krämer, K.W. Synergistic Effect of Dielectric Barrier Discharge Plasma and TiO2-Pillared Montmorillonite on the Degradation of Rhodamine B in an Aqueous Solution. Catalysts 2020, 10, 359.

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