title: Improved selectivity towards NO₂ of phthalocyanine-based chemosensors by means of original indigo/nanocarbons hybrid material.
abstract: A new and original gas sensor-system dedicated to the selective monitoring of nitrogen dioxide in air and in the presence of ozone, has been successfully achieved. Because of its high sensitivity and its partial selectivity towards oxidizing pollutants (nitrogen dioxide and ozone), copper phthalocyanine-based chemoresistors are relevant. The selectivity towards nitrogen dioxide results from the implementation of a high efficient and selective ozone filter upstream the sensing device. Thus, a powdered indigo/nanocarbons hybrid material has been developed and investigated for such an application. If nanocarbonaceous material acts as a highly permeable matrix with a high specific surface area, immobilized indigo nanoparticles are involved into an ozonolysis reaction with ozone leading to the selective removal of this analytes from air sample. The filtering yields towards each gas have been experimentally quantified and establish the complete removal of ozone while having the concentration of nitrogen dioxide unchanged. Long-term gas exposures reveal the higher durability of hybrid material as compared to nanocarbons and indigo separately. Synthesis, characterizations by many complementary techniques and tests of hybrid filters are detailed. Results on sensor-system including CuPc-based chemoresistors and indigo/carbon nanotubes hybrid material as in-line filter are illustrated. Sensing performances will be especially discussed.
authors.affiliation: Clermont Université, Université Blaise Pascal, Institut Pascal, BP 10448, F-63000 Clermont-Ferrand, France; CNRS, UMR 6602, Institut Pascal, F-63171 Aubière, France; Laboratoire d׳Excellence Mobilité Innovante IMobS3, Université Blaise Pascal, 24 Avenue des Landais, BP 80026, 63171 Aubière Cedex, France. Electronic address: brunet@univ-bpclermont.fr.
authors.forename: J
authors.initials: J
authors.lastname: Brunet
authors.affiliation: Clermont Université, Université Blaise Pascal, Institut Pascal, BP 10448, F-63000 Clermont-Ferrand, France; CNRS, UMR 6602, Institut Pascal, F-63171 Aubière, France; Laboratoire d׳Excellence Mobilité Innovante IMobS3, Université Blaise Pascal, 24 Avenue des Landais, BP 80026, 63171 Aubière Cedex, France.
authors.forename: A
authors.initials: A
authors.lastname: Pauly
authors.affiliation: Clermont Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, F-63000 Clermont-Ferrand, France; CNRS, UMR 6002, Institut de Chimie de Clermont-Ferrand, F-63177 Aubière, France; Laboratoire d׳Excellence Mobilité Innovante IMobS3, Université Blaise Pascal, 24 Avenue des Landais, BP 80026, 63171 Aubière Cedex, France.
authors.forename: M
authors.initials: M
authors.lastname: Dubois
authors.affiliation: Department of Inorganic Chemistry, Industrial Engineers School, Universidad de Valladolid, P del Cauce 53, 47011 Valladolid, Spain; Laboratoire d׳Excellence Mobilité Innovante IMobS3, Université Blaise Pascal, 24 Avenue des Landais, BP 80026, 63171 Aubière Cedex, France.
authors.forename: M L
authors.initials: ML
authors.lastname: Rodriguez-Mendez
authors.affiliation: Clermont Université, Université Blaise Pascal, Institut Pascal, BP 10448, F-63000 Clermont-Ferrand, France; CNRS, UMR 6602, Institut Pascal, F-63171 Aubière, France; Laboratoire d׳Excellence Mobilité Innovante IMobS3, Université Blaise Pascal, 24 Avenue des Landais, BP 80026, 63171 Aubière Cedex, France.
authors.forename: A L
authors.initials: AL
authors.lastname: Ndiaye
authors.affiliation: Clermont Université, Université Blaise Pascal, Institut Pascal, BP 10448, F-63000 Clermont-Ferrand, France; CNRS, UMR 6602, Institut Pascal, F-63171 Aubière, France; Laboratoire d׳Excellence Mobilité Innovante IMobS3, Université Blaise Pascal, 24 Avenue des Landais, BP 80026, 63171 Aubière Cedex, France.
authors.forename: C
authors.initials: C
authors.lastname: Varenne
authors.affiliation: Clermont Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, F-63000 Clermont-Ferrand, France; CNRS, UMR 6002, Institut de Chimie de Clermont-Ferrand, F-63177 Aubière, France; Laboratoire d׳Excellence Mobilité Innovante IMobS3, Université Blaise Pascal, 24 Avenue des Landais, BP 80026, 63171 Aubière Cedex, France.
authors.forename: K
authors.initials: K
authors.lastname: Guérin
mesh_terms: D000327:Adsorption; D000393:Air Pollutants / Q000032:analysis* / Q000737:chemistry; D007203:Indigo Carmine / Q000737:chemistry*; D007211:Indoles / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry; D037742:Nanotubes, Carbon / Q000737:chemistry*; D009585:Nitrogen Dioxide / Q000032:analysis* / Q000737:chemistry; D009942:Organometallic Compounds / Q000737:chemistry*; D010126:Ozone / Q000032:analysis* / Q000737:chemistry
chemical_list: D000393:Air Pollutants; D007211:Indoles; D037742:Nanotubes, Carbon; D009942:Organometallic Compounds; C015445:copper phthalocyanine; D010126:Ozone; D007203:Indigo Carmine; D009585:Nitrogen Dioxide
keywords: Chemoresistor; Indigo; Nanocarbons; Nitrogen dioxide; Phthalocyanine; Sensor selectivity