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

Catalysts

KarlW. Krämer¹  SofiaP. Karamysheva²  NikolayV. Zinenko³  MikhailF. Butman³  NikolayL. Ovchinnikov³  AndreyA. Gushchin³  GrigoriyI. Gusev³ 

[1] Department of Chemistry and Biochemistry, University of Bern, 3012 Bern, Switzerland;Industrial Laboratory, SCAMT Institute, ITMO University, 191002 Saint Petersburg, Russia;Ivanovo State University of Chemistry and Technology, 153000 Ivanovo, Russia;

关键词: photocatalysis;    titanium dioxide;    dielectric barrier discharge plasma;    water treatment;    rhodamine b;   

DOI  :  10.3390/catal10040359

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown