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Article Dans Une Revue Sensors Année : 2021

Conductive Polymer Composites for Hydrogen Sulphide Sensors Working at Sub-PPM Level and Room Temperature

Caroline Duc
Thomas Fagniez
Nathalie Redon
Jean-Luc Wojkiewicz

Résumé

Hybrid composites based on tin chloride and the conductive polymers, polyaniline (PAni) and poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), were integrated into high-performance hydrogen sulphide (H2S) gas sensors working at room temperature. The morphology and chemical properties were studied by scanning and transmission electron microscopy (SEM, TEM), energy dispersive spectroscopy (EDS) and Fourier-transform infrared (FTIR). The composites demonstrated a slightly porous nanostructure and strong interactions between the polymers and the metal salt, which slightly dopes PAni. The hybrid sensors exhibited a very low detection limit (<85 ppb), fast response, repeatability, reproducibility and stability over one month. Moreover, this work presents how calibration based on the derivative of the signal can give hybrid sensors the ability to quantify the concentration of targeted gas, even during continuous variation of the analyte concentration. Finally, the effect of interfering species, such as water and ammonia, is discussed.

Dates et versions

hal-03380658 , version 1 (15-10-2021)

Identifiants

Citer

Caroline Duc, Mohamed Lamine Boukhenane, Thomas Fagniez, Lahcen Khouchaf, Nathalie Redon, et al.. Conductive Polymer Composites for Hydrogen Sulphide Sensors Working at Sub-PPM Level and Room Temperature. Sensors, 2021, 21 (19), pp.6529. ⟨10.3390/s21196529⟩. ⟨hal-03380658⟩
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