Premium
Photocatalytically Active Polyelectrolyte/Nanoparticle Films for the Elimination of a Model Odorous Gas
Author(s) -
Dontsova Dariya,
Keller Valérie,
Keller Nicolas,
Steffanut Pascal,
Félix Olivier,
Decher Gero
Publication year - 2011
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201100192
Subject(s) - materials science , nanoporous , chemical engineering , nanoparticle , polyelectrolyte , styrene , scanning electron microscope , sulfonate , catalysis , permeation , photocatalysis , thin film , nanotechnology , copolymer , membrane , composite material , sodium , polymer , organic chemistry , chemistry , biochemistry , engineering , metallurgy
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.