Original title: Photocatalytic properties of plasma treated tungsten oxide
Translated title: Fotokatalytické vlastnosti plazmově zpracovaného oxidu wolframového
Authors: Brožek, Vlastimil ; Domlátil, J. ; Mastný, L. ; Šrank, Z. ; Janča, J. ; Eliáš, M.
Document type: Papers
Conference/Event: International Congress of Chemical and Process Engineering CHISA 2006/17th./, Praha (CZ), 2006-08-27 / 2006-08-31
Year: 2006
Language: eng
Abstract: [eng] [cze]
Tungsten trioxide with the band gap about 2.58 eV is known as a material, which a photocatalytic effect after UV-radiation exposure can be observed. However, in some cases more detailed material specification and the consideration of its complex structural and stoichiometric uniqueness are lacked in its photoactivity data. The presented work is focused on the study of tungsten trioxide samples photoactivity using the unified method that determines the reference substances colour changes after 360 nm UV-radiation exposure. The samples were prepared by from ammonium paratungstate treated in oxygen or argon plasma, which was generated by capacitive coupled RF generator operated at low partial pressures. The differences in oxygen stoichiometry which depends on total temperature plasma, because especially the presence of hydrogen coming from the ammonium cation disintegration causes a partial reduction partly to the WO2.7 oxide. Oxid wolframový s šířkou zakázaného pásu 2,58 eV je znám jako materiál vykazující fotokatalytický efekt při expozici UV zářením. Specifikou oxidu wolframového je jeho strukturní a nestechiometrická rozmanitost. V práci jsou popsány experimenty charakterizující fotoaktivitu produktů plazmochemické redukce oxidu wolframového až do hodnoty WO2,7.
Keywords: photocatalysis; plasma treatment; tungsten oxide
Project no.: CEZ:AV0Z20430508 (CEP), GA104/05/0540 (CEP)
Funding provider: GA ČR
Host item entry: Summaries, ISBN 80-86059-45-6
Note: Související webová stránka: www.chisa.cz

Institution: Institute of Plasma Physics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0136014

Permalink: http://www.nusl.cz/ntk/nusl-35690


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Research > Institutes ASCR > Institute of Plasma Physics
Conference materials > Papers