Fiche publication
Date publication
février 2020
Journal
Talanta
Auteurs
Membres identifiés du Cancéropôle Est :
Pr SANCHEZ Jean-Baptiste
Tous les auteurs :
Sanchez JB, Sanchez-Sanchez A, Izquierdo MT, Mathieu S, Ghanbaja J, Berger F, Celzard A, Fierro V
Lien Pubmed
Résumé
Interesting sensing performances of indoor formaldehyde pollution were obtained when small amounts of zinc were introduced in tin oxides. Nanostructured Sn oxide-based porous materials doped with Zn or not, were synthesized using hydrothermal routes. The physicochemical properties of the as-prepared metal-oxide materials were characterized using nitrogen adsorption, X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Gas sensors were prepared using the aforementioned tin oxide materials and they exhibited a high sensitivity to formaldehyde at 230 °C, as well as a good repeatability over the time. Their limit of formaldehyde detection was as low as 8 ppb in dry air and 50 ppb in air with 60% RH at 25 °C. These results were much better that those reported in the open literature and they were attributed to both higher area BET, around 180 m/g, and smaller crystallite size, 3.1 nm.
Mots clés
chemical gas sensor, formaldehyde, indoor air pollution, nanoporous material, tin oxide
Référence
Talanta. 2020 Feb 1;208:120396
