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Atmospheric plasma generates oxygen atoms as oxidizing species in aqueous solutions
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SYSNO ASEP 0466374 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Atmospheric plasma generates oxygen atoms as oxidizing species in aqueous solutions Tvůrce(i) Hefny, M.M. (EG)
Pattyn, C. (DE)
Lukeš, Petr (UFP-V) RID, ORCID
Benedikt, J. (DE)Zdroj.dok. Journal of Physics D-Applied Physics. - : Institute of Physics Publishing - ISSN 0022-3727
Roč. 49, č. 40 (2016), s. 404002Poč.str. 13 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova atmospheric pressure plasma ; transport of reactive species ; reactive oxygen species ; aqueous phase chemistry ; plasma and liquids ; phenol aqueous chemistry Vědní obor RIV BL - Fyzika plazmatu a výboje v plynech CEP LD14080 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Institucionální podpora UFP-V - RVO:61389021 UT WOS 000384103200002 EID SCOPUS 84988941278 DOI 10.1088/0022-3727/49/40/404002 Anotace A remote microscale atmospheric pressure plasma jet (µAPPJ) with He, He/H2O, He/O2, and He/O2/H2O gas mixtures was used to study the transport of reactive species from the gas phase into the liquid and the following aqueous phase chemistry. The effects induced by the µAPPJ in water were quantitatively studied using phenol as a chemical probe and by measuring H2O2 concentration and pH values. These results were combined with the analysis of the absolute densities of the reactive species and the modeling of convective/diffusion transport and recombination reactions in the effluent of the plasma jet. Additionally, modified plasma jets were used to show that the role of emitted photons in aqueous chemistry is negligible for these plasma sources. The fastest phenol degradation was measured for the He/O2 plasma, followed by He/H2O, He/O2/H2O, and He plasmas. The modeled quantitative flux of O atoms into the liquid in the He/O2 plasma case was highly comparable with the phenol degradation rate and showed a very high transfer efficiency of reactive species from the plasma into the liquid, where more than half of the O atoms leaving the jet nozzle entered the liquid. Pracoviště Ústav fyziky plazmatu Kontakt Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Rok sběru 2017
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