RT info:eu-repo/semantics/article
T1 Improved selectivity towards NO2 of phthalocyanine-based chemosensors by means of original indigo/nanocarbons hybrid material.
A1 Pauly, Alain
A1 Dubois, Marc
A1 Brunet, Jéroîme
A1 Rodríguez Méndez, María Luz
A1 Ndiaye, Amadou
A1 Spinelle, L
A1 Varenne, Christelle
A1 Lauron, B
A1 Guerin, Katia
AB 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.
PB Elsevier
SN 0925-4005
YR 2014
FD 2014
LK http://uvadoc.uva.es/handle/10324/30602
UL http://uvadoc.uva.es/handle/10324/30602
LA eng
NO Talanta Volume 127, 1 September 2014, Pages 100–107
NO Producción Científica
DS UVaDOC
RD 12-nov-2024