The preparation of three different functionalized palladium nanoparticles (PdNPs) systems for room temperature BTX (benzene, toluene, p-xylene) sensing detection and their morphostructural characterization is described. PdNPs are prepared through a two-phase water/toluene wet chemical reduction method in the presence of bifunctional organic thiols as stabilizing agents suitable for the formation of covalently linked PdNPs networks: p-terphenyl-4,4 ''-dithiol (PdNPs-TR), biphenyl-4,4 '-dithiol (PdNPs-BP), or with 9,9-didodecyl-2,7-bis(acetylthio)fluorene (PdNPs-FL). Comparing the hydrodynamic diameter values, TR and BP ligands help to obtain networks consisting of spherical NPs of about 2 nm, in which each bifunctional ligand act as a bridge between PdNPs. In contrast, PdNPs-FL show a population centered at = 45 +/- 5 nm. To perform preliminary gas sensing measurements, PdNPs networks are cast deposited on interdigitated electrodes to study their resistive response toward volatile organic compounds (VOCs) such as benzene (0-5%), toluene (0-1.7%), and p-xylene (0-0.4%) (BTX) and common interfering gases (H2S, NH3, SO2, and relative humidity, RH). PdNPs-FL show enhanced response to BTX with an appreciable response also toward H2S and RH. PdNPs-TR exhibit a better ability to discriminate benzene gas with a negligible response after H2S exposure. Moreover, all the PdNPs systems show little to no response to NH3 and SO2 gases, offering an interesting perspective in practical sensing applications.

Cerra, S., Salamone, T.a., Bearzotti, A., Hajareh Haghighi, F., Mercurio, M., Marsotto, M., et al. (2023). Thiol‐Functionalized Palladium Nanoparticles Networks: Synthesis, Characterization, and Room Temperature (Toxic) Vapor Detection. PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION, 40(4) [10.1002/ppsc.202200189].

Thiol‐Functionalized Palladium Nanoparticles Networks: Synthesis, Characterization, and Room Temperature (Toxic) Vapor Detection

Marsotto, Martina;
2023-01-01

Abstract

The preparation of three different functionalized palladium nanoparticles (PdNPs) systems for room temperature BTX (benzene, toluene, p-xylene) sensing detection and their morphostructural characterization is described. PdNPs are prepared through a two-phase water/toluene wet chemical reduction method in the presence of bifunctional organic thiols as stabilizing agents suitable for the formation of covalently linked PdNPs networks: p-terphenyl-4,4 ''-dithiol (PdNPs-TR), biphenyl-4,4 '-dithiol (PdNPs-BP), or with 9,9-didodecyl-2,7-bis(acetylthio)fluorene (PdNPs-FL). Comparing the hydrodynamic diameter values, TR and BP ligands help to obtain networks consisting of spherical NPs of about 2 nm, in which each bifunctional ligand act as a bridge between PdNPs. In contrast, PdNPs-FL show a population centered at = 45 +/- 5 nm. To perform preliminary gas sensing measurements, PdNPs networks are cast deposited on interdigitated electrodes to study their resistive response toward volatile organic compounds (VOCs) such as benzene (0-5%), toluene (0-1.7%), and p-xylene (0-0.4%) (BTX) and common interfering gases (H2S, NH3, SO2, and relative humidity, RH). PdNPs-FL show enhanced response to BTX with an appreciable response also toward H2S and RH. PdNPs-TR exhibit a better ability to discriminate benzene gas with a negligible response after H2S exposure. Moreover, all the PdNPs systems show little to no response to NH3 and SO2 gases, offering an interesting perspective in practical sensing applications.
2023
Pubblicato
Rilevanza internazionale
Articolo
Esperti non anonimi
Settore CHIM/03
English
Con Impact Factor ISI
bifunctional thiols
interconnected nanoparticles
palladium nanoparticles
sensing properties
toxic gases
Cerra, S., Salamone, T.a., Bearzotti, A., Hajareh Haghighi, F., Mercurio, M., Marsotto, M., et al. (2023). Thiol‐Functionalized Palladium Nanoparticles Networks: Synthesis, Characterization, and Room Temperature (Toxic) Vapor Detection. PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION, 40(4) [10.1002/ppsc.202200189].
Cerra, S; Salamone, Ta; Bearzotti, A; Hajareh Haghighi, F; Mercurio, M; Marsotto, M; Battocchio, C; Fioravanti, R; Diociaiuti, M; Fratoddi, I
Articolo su rivista
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/364740
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 2
  • ???jsp.display-item.citation.isi??? 2
social impact