title: Indigo molecules adsorbed on carbonaceous nanomaterials as chemical filter for the selective detection of NO2 in the environment.
abstract: In order to enhance the durability of chemical filters for ozone molecules, devoted to microsystem for the selective detection of NO2 in the environment, the adsorption of indigo molecules onto the surface of carbonaceous nanomaterials (multi-walled carbon nanotubes, a mixture of nanodisks/nanocones, nanofibres) was investigated. The surface of the multi-walled carbon nanotubes was coated by π-stacking with adsorbed indigo molecules. An excess of indigo has resulted in a biphasic sample where nanotubes covered with indigo coexist with free indigo particles. Although similar filtering yields toward O3 (close to 100%) and NO2 (around 0%) were obtained as compared to individual materials, the indigo/MWCNTs samples exhibit enhanced durability as chemical filter at high ozone concentration (1 ppm).
authors.affiliation: Clermont Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, F-63000 Clermont-Ferrand, France. Marc.Dubois@univ-bpclermont.fr
authors.forename: Marc
authors.initials: M
authors.lastname: Dubois
authors.forename: Jérôme
authors.initials: J
authors.lastname: Brunet
authors.forename: Alain
authors.initials: A
authors.lastname: Pauly
authors.forename: Wikenson
authors.initials: W
authors.lastname: Simond
authors.forename: Laurent
authors.initials: L
authors.lastname: Spinelle
authors.forename: Amadou
authors.initials: A
authors.lastname: Ndiaye
authors.forename: Katia
authors.initials: K
authors.lastname: Guérin
authors.forename: Christelle
authors.initials: C
authors.lastname: Varenne
mesh_terms: D000327:Adsorption; D007211:Indoles / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D037742:Nanotubes, Carbon / Q000737:chemistry*; D009585:Nitrogen Dioxide / Q000032:analysis*
chemical_list: D007211:Indoles; D037742:Nanotubes, Carbon; D009585:Nitrogen Dioxide
keywords: Adsorption; Chemical filter; Gas detection; Hybrid materials; Indigo; Microsystem; Multi-walled carbon nanotubes; Nitrogen dioxide; Ozone; Pollution