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Article Dans Une Revue Talanta Année : 2019

Nanostructured tin oxide materials for the sub-ppm detection of indoor formaldehyde pollution

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 m2/g, and smaller crystallite size, 3.1 nm.

Domaines

Matériaux
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Dates et versions

hal-02357740 , version 1 (10-11-2019)

Identifiants

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Jean-Baptiste Sanchez, Angela Sanchez-Sanchez, Maria Teresa Izquierdo, Sandrine Mathieu, Jaafar Ghanbaja, et al.. Nanostructured tin oxide materials for the sub-ppm detection of indoor formaldehyde pollution. Talanta, 2019, 208, pp.120396. ⟨10.1016/j.talanta.2019.120396⟩. ⟨hal-02357740⟩
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