NOx adsorption onto dehydroxylated or hydroxylated tin dioxide surface. Application to SnO2-based sensors
| Autor: | Laurent Périer-Camby, E. Leblanc, M. Primet, Patrick Gélin, R. Gibert, Gérard Thomas |
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| Přispěvatelé: | Centre Sciences des Processus Industriels et Naturels (SPIN-ENSMSE), École des Mines de Saint-Étienne (Mines Saint-Étienne MSE), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Laboratoire des Procédés en Milieux Granulaires (LPMG-EMSE), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS), Département Procédés et évolution des systèmes avec solides (ProcESS-ENSMSE), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-SPIN, Laboratoire d'Application de la Chimie à l'Environnement (LACE), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Université Claude Bernard Lyon I (LACE), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon |
| Rok vydání: | 2000 |
| Předmět: |
Denticity
Thermal desorption spectroscopy Inorganic chemistry Hydroxyl groups 02 engineering and technology 010402 general chemistry 01 natural sciences Fourier transform spectroscopy chemistry.chemical_compound Adsorption Materials Chemistry NO2 adsorption [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering Electrical and Electronic Engineering Instrumentation NOx Sensors Chemistry Tin dioxide Metals and Alloys 021001 nanoscience & nanotechnology Condensed Matter Physics Tin oxide 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials DRIFT spectroscopy Diffuse reflection TPD 0210 nano-technology |
| Zdroj: | Sensors and Actuators B: Chemical Sensors and Actuators B: Chemical, Elsevier, 2000, 62 (1), pp.67-72. ⟨10.1016/S0925-4005(99)00376-7⟩ |
| ISSN: | 0925-4005 |
| Popis: | International audience; SnO2-based sensors present strong interactions with NOx-containing atmospheres. For this reason, it is fundamental to identify the nature of the adsorbed species resulting from the interaction of NO and NO2 with the tin oxide surface. This aspect has been studied in literature by Temperature Programmed Desorption (TPD). To state more precisely structures of adsorbed species, we link TPD with Diffuse Reflectance Fourier Transform Spectroscopy (DRIFTS). Concerning NO2 adsorption, DRIFTS experiments indicate the formation of monodentate nitrato species at room temperature. By increasing the temperature, a conversion of adsorbed species is observed. The nature of surface groups is discussed. In the presence of hydroxyl groups (two different OH groups are evidenced), the formation of hydrogeno nitrates is detected. |
| Databáze: | OpenAIRE |
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