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 <2RH> = 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.

Thiol-functionalized palladium nanoparticles networks. Synthesis, characterization, and room temperature (toxic) vapor detection / Cerra, Sara; Salamone, Tommaso A.; Bearzotti, Andrea; HAJAREH HAGHIGHI, Farid; Mercurio, Martina; Marsotto, Martina; Battocchio, Chiara; Fioravanti, Raoul; Diociaiuti, Marco; Fratoddi, Ilaria. - In: PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION. - ISSN 0934-0866. - (2023). [10.1002/ppsc.202200189]

Thiol-functionalized palladium nanoparticles networks. Synthesis, characterization, and room temperature (toxic) vapor detection

Sara Cerra
Primo
;
Tommaso A. Salamone
Secondo
;
Farid Hajareh Haghighi;Martina Mercurio;Raoul Fioravanti;Ilaria Fratoddi
Ultimo
2023

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 <2RH> = 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
bifunctional thiols; interconnected nanoparticles; palladium nanoparticles; sensing properties; toxic gases
01 Pubblicazione su rivista::01a Articolo in rivista
Thiol-functionalized palladium nanoparticles networks. Synthesis, characterization, and room temperature (toxic) vapor detection / Cerra, Sara; Salamone, Tommaso A.; Bearzotti, Andrea; HAJAREH HAGHIGHI, Farid; Mercurio, Martina; Marsotto, Martina; Battocchio, Chiara; Fioravanti, Raoul; Diociaiuti, Marco; Fratoddi, Ilaria. - In: PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION. - ISSN 0934-0866. - (2023). [10.1002/ppsc.202200189]
File allegati a questo prodotto
File Dimensione Formato  
Cerra_Thiol-functionalized_2023.pdf

solo gestori archivio

Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 3.2 MB
Formato Adobe PDF
3.2 MB Adobe PDF   Contatta l'autore

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/11573/1666235
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 1
  • ???jsp.display-item.citation.isi??? 1
social impact