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Istituto sull'inquinamento atmosferico

Torna all'elenco Contributi in rivista anno 2017

Contributo in rivista

Tipo: Articolo in rivista

Titolo: Elemental mercury vapor chemoresistors employing TIO2 nanofibers photocatalytically decorated with Au-nanoparticles

Anno di pubblicazione: 2017

Formato: Elettronico Cartaceo

Autori: Antonella Macagnano, Viviana Perri , Emiliano Zampetti, Anna Marie Ferretti, Francesca Sprovieri, Nicola Pirrone, Andrea Bearzotti, Giulio Esposito, Fabrizio De Cesare

Affiliazioni autori: Institute of Atmospheric Pollution Research-National Research Council (CNR-IIA), Via Salaria km 29,300 Montelibretti 00016 (RM), Italy; Department of Physics-University of Calabria, via Pietro Bucci, Arcavacata, Rende 87036 (CS), Italy; Department of Chemistry, University of Milan, Via Venezian, 21, 20133 Milano, Italy; Department of Innovation in Biological Systems, Food and Forestry-University of Tuscia (DIBAF-UNITUS), Via S. Camillo de Lellis, 01100 Viterbo, Italy, Italy; Institute of Atmospheric Pollution Research-National Research Council (CNR-IIA), Division of Rende, c/o UNICAL-Polifunzionale Arcavacata, Rende 87036 (CS), Italy

Autori CNR:

  • ANDREA BEARZOTTI
  • FABRIZIO DE CESARE
  • GIULIO ESPOSITO
  • ANNA MARIA FERRETTI
  • ANTONELLA MACAGNANO
  • NICOLA PIRRONE
  • FRANCESCA SPROVIERI
  • EMILIANO ZAMPETTI

Lingua: inglese

Abstract: The toxicity of mercury, its ubiquitous presence and the complexity of its cycle in the environment push for urgent actions at both local and global level to develop detection and monitoring systems characterized by fast responses, low cost, low maintenance and ease of use. As a result of the combination of gold affinity for mercury with the nanoscale size of the frameworks, gold nanostructures look the most promising nanomaterials for creating novel sensors with sensing features comparable to those of commercial complex and expensive analytical systems currently available. Composite nanofi- brous electrospun layers of titania decorated with gold nanoparticles (AuNPs) were fabricated to obtain nanostructured materials capable of adsorbing elemental mercury. Linker-free gold nanoparticles were grown on the electrospun titania nanofibers through the photocatalytic reduction of tetrachloroauric acid carried out by UV-irradiated nanofibers of titania in the presence of an organic capping reagent. Chemoresistors employing such decorated nanomaterials were then created in order to detect mercury vapors in the atmosphere. Various decorations of titania nanofibers with gold nanoparticles deposited onto distinct substrates were morphologically investigated at nanoscale. The electrical properties of the resulting chemoresistors were assessed. The capacity of chemoresistors employing various amounts of AuNPs for detecting low concentrations of mercury vapors (tens of ppt) in both static and dynamic (i.e. under a carrier gas flow - synthetic air) conditions was tested. The potential of the resulting sensors in environmental monitoring of elemental mercury vapors is discussed

Lingua abstract: inglese

Pagine da: 957

Rivista:

Sensors and actuators. B, Chemical Elsevier Sequoia
Paese di pubblicazione: Svizzera
Lingua: inglese
ISSN: 0925-4005

Numero volume: 247

DOI: 10.1016/j.snb.2017.03.037 0925-4005

Referee: Ś: Internazionale

Stato della pubblicazione: Published version

Parole chiave:

  • sensors
  • atmosphere mercury vapor
  • electrospinning
  • titania nanofibers
  • gold nanoparticles
  • photocatalysis

URL: http://www.sciencedirect.com/science/article/pii/S0925400517304549

Altre informazioni: Il lavoro ha anche un corrigendum a causa di un errore nella stampa di uno dei nomi degli autori e della sua affiliazione.

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