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Article Dans Une Revue Colloid and Interface Science Communications Année : 2021

Vapor-phase impregnation decomposition technique as an alternativeto decorate MWCNTs withPt and PdNPs for ammonia gas detection

Résumé

The Vapor Phase Impregnation decomposition method (VP-IDM) is presented in this study as an alternative technique to obtain well-dispersed metallic nanoparticles on CNTs, for ammonia (NH 3) gas detection. We have analyzed the effectiveness of this method by using chemiresistive sensors (CHRs) based on multi-walled carbon nanotubes (MWCNTs) decorated with Pt and Pd nanoparticles (NPs). We measured their sensitivity through their electrical resistance variation in the presence of NH 3 gas at concentrations from 10 to 200 ppm. Pt/MWCNTs showed the highest sensitivity of about 120% at 100 ppm and 250 • C. It was revealed that the size, dispersion, temperature and type of metal NPs deposited on the MWCNTs are crucial for the detection of the NH 3 gas by the CHRs.
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Dates et versions

hal-03600864 , version 1 (07-03-2022)

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S Capula-Colindres, G Terán, E Torres-Santillán, Khalifa Aguir, O. G. Súchil, et al.. Vapor-phase impregnation decomposition technique as an alternativeto decorate MWCNTs withPt and PdNPs for ammonia gas detection. Colloid and Interface Science Communications, 2021, 44, pp.100490. ⟨10.1016/j.colcom.2021.100490⟩. ⟨hal-03600864⟩
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