title: Photocatalytically active polyelectrolyte/nanoparticle films for the elimination of a model odorous gas.
abstract: Virtually transparent films of Aeroxide TiO(2) P25 were fabricated via layer-by-layer assembly with sodium poly(styrene sulfonate). Nanoscale films are formed on model surfaces for characterization or inside of cylindrical reactors for investigating the catalytic properties. Films are fairly homogeneous and smooth over large areas and show different optical interference colors depending on film thickness. The application-relevant photocatalytic performance of such films toward on-flow degradation of hydrogen sulfide under UV-A irradiation was investigated. Scanning electron microscopy reveals a nanoporous structure allowing for the permeation of gas. Consequently, the catalytic efficiency of the films increases with increasing film thickness retaining a considerable activity of the corresponding nanoparticle powder. Scheme 1 depicts in a general way the functionalized reactor and the principle of the measurement.
authors.affiliation: Institut Charles Sadron, CNRS UPR 22, Strasbourg, France.
authors.forename: Dariya
authors.initials: D
authors.lastname: Dontsova
authors.forename: Valérie
authors.initials: V
authors.lastname: Keller
authors.forename: Nicolas
authors.initials: N
authors.lastname: Keller
authors.forename: Pascal
authors.initials: P
authors.lastname: Steffanut
authors.forename: Olivier
authors.initials: O
authors.lastname: Félix
authors.forename: Gero
authors.initials: G
authors.lastname: Decher
mesh_terms: D000393:Air Pollutants / Q000737:chemistry*; D002384:Catalysis; D004573:Electrolytes / Q000737:chemistry*; D006862:Hydrogen Sulfide / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D055668:Photochemical Processes; D013458:Sulfur Dioxide / Q000737:chemistry*; D014466:Ultraviolet Rays
chemical_list: D000393:Air Pollutants; D004573:Electrolytes; D013458:Sulfur Dioxide; D006862:Hydrogen Sulfide