Autor según el artículo: Kacem, Khaoula; Casanova-Chafer, Juan; Ameur, Sami; Nsib, Mohamed Faouzi; Llobet, Eduard
Departamento: Enginyeria Electrònica, Elèctrica i Automàtica
Autor/es de la URV: Casanova Chafer, Juan / Llobet Valero, Eduard
Palabras clave: Srtio perovskite 3 No 2 Nh 3 Graphene oxide Gas sensor Co 2
Resumen: This paper reports a straightforward and inexpensive method for the fabrication of gas sensing devices based on graphene oxide (GO) synthesized by a modified Hummer's method and decorated with strontium titanate perovskite (SrTiO3). The active layers developed were employed for the detection of hazardous gases such as NO2, CO2, and NH3. The physical and chemical properties were also analyzed using various experimental techniques including field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray powder diffraction (XRD), and Raman spectroscopy. Repeated response and recovery cycles were applied in the detection of nitrogen dioxide (NO2), carbon dioxide (CO2), and ammonia (NH3). Accordingly, the gas sensing study reveals that decorated GO exhibits a high response towards NO2 at an operating temperature of 100 °C with good sensitivity (up to 4-fold higher than that of pristine GO) and highly improved selectivity. Additionally, the effect of ambient humidity was tested for NO2, demonstrating that GO/SrTiO3 sensors show a good immunity to humidity cross-sensitivity. Lastly, a gas sensing mechanism was schematically proposed and discussed. These findings prove that the functionalization of GO with SrTiO3 can overcome the limitations of GO-based sensors by enhancing their adsorption capability of gas molecules and their sensitivity towards target gases.
Áreas temáticas: Química Planejamento urbano e regional / demografia Odontología Metals and alloys Metallurgy & metallurgical engineering Mechanics of materials Mechanical engineering Materials science, multidisciplinary Materials science Materials chemistry Materiais Matemática / probabilidade e estatística Interdisciplinar Geociências Farmacia Ensino Engenharias iv Engenharias iii Engenharias ii Engenharias i Ciências biológicas i Ciências ambientais Ciências agrárias i Chemistry, physical Biotecnología Astronomia / física Antropologia / arqueologia Administração pública e de empresas, ciências contábeis e turismo
Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
Direcció de correo del autor: juan.casanova@urv.cat eduard.llobet@urv.cat
Identificador del autor: 0000-0001-6164-4342
Fecha de alta del registro: 2024-10-12
Versión del articulo depositado: info:eu-repo/semantics/publishedVersion
URL Documento de licencia: https://repositori.urv.cat/ca/proteccio-de-dades/
Referencia al articulo segun fuente origial: Journal Of Alloys And Compounds. 941 169011-
Referencia de l'ítem segons les normes APA: Kacem, Khaoula; Casanova-Chafer, Juan; Ameur, Sami; Nsib, Mohamed Faouzi; Llobet, Eduard (2023). Gas sensing properties of graphene oxide loaded with SrTiO3 nanoparticles. Journal Of Alloys And Compounds, 941(), 169011-. DOI: 10.1016/j.jallcom.2023.169011
Entidad: Universitat Rovira i Virgili
Año de publicación de la revista: 2023
Tipo de publicación: Journal Publications