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À propos de : Nonthermal Plasma Abatement of Trichloroethylene Enhanced by Photocatalysis        

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  • Nonthermal Plasma Abatement of Trichloroethylene Enhanced by Photocatalysis
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  • 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 SMFelectrodes modified with TiO2 and MnO2 were observed to be catalytically active. Their efficiency in TCEdecomposition was compared with a Cu inner electrode. The SMF electrode modified with MnO2 and TiO2catalyst effectively destroys TCE due to the synergy between plasma excitation of the TCE molecules andtheir catalytic oxidation. The latter process was observed to be further enhanced by photocatalysis since TiO2absorbs the UV light produced by the NTP. These innovative TiO2-modified SMF electrodes were characterizedby X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM), confirming formationof titania anatase, whereas the emission spectrum of the plasma showed the presence of ultraviolet light.
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