Nonthermal Plasma Abatement of Trichloroethylene Enhanced by Photocatalysis

Abstract

Abatement of trichloroethylene (TCE, 250 ppm in air) was studied in a novel nonthermal plasma (NTP) dielectric barrier discharge reactor with an inner electrode made of sintered metal fibers (SMF). The SMF electrodes modified with TiO 2 and MnO 2 were observed to be catalytically active. Their efficiency in TCE decomposition was compared with a Cu inner electrode. The SMF electrode modified with MnO 2 and TiO 2 catalyst effectively destroys TCE due to the synergy between plasma excitation of the TCE molecules and their catalytic oxidation. The latter process was observed to be further enhanced by photocatalysis since TiO 2 absorbs the UV light produced by the NTP. These innovative TiO 2 -modified SMF electrodes were characterized by X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM), confirming formation of titania anatase, whereas the emission spectrum of the plasma showed the presence of ultraviolet light.

A Facile Approach for Direct Decomposition of Nitrous Oxide Assisted by Non‐Thermal Plasma

“…The recent progress in applying NTP technology to the control of air pollutants such as SO 2 , H 2 S, NO x , and volatile organic compounds is very encouraging 26–41. It was reported that H 2 S decomposition in a DBD reactor packed with dielectric materials (ceramic and glass beads) improved the performance of NTP technique 36.…”

Synergistic degradation performance and mechanism of 17β-estradiol by dielectric barrier discharge non-thermal plasma combined with Pt–TiO2

“…HO 2 •+ H 2 O→H 2 O 2 +•OH (10) In addition, the influence of pH on the ionization of the reactant compounds and products may be an important factor to consider. The molecule of E2 becomes neutral in an acidic medium and starts to become negatively charged at alkaline conditions [35].…”

“…Magureanu et al [10] observed that the intensity and emission spectrum of UV light formed at 20 kV were less than 4000 a.u. and 400 nm, respectively.…”

Effect of TiO2-ZnO/GAC on by-product distribution of CVOCs decomposition in a NTP-assisted catalysis system

“…However, due to the formation of many harmful by-products employing this technique alone lies into several limitations. Instead, a NTP-catalysis hybrid process has been recently suggested, believing that it leads to both higher removal effi ciency, and much better by-products distribution 8,9 . Nevertheless, searching to fi nd a suitable catalyst which shows the best catalytic activity and also by-products selectivity in combination with NTP is still going on 10 .…”