Articles producció científica> Enginyeria Química

Role of the synthesis route on the properties of hybrid LDH-graphene as basic catalysts

  • Datos identificativos

    Identificador: PC:2488
    Autores:
    Mayra G. ÁlvarezDidier TichitFrancesc MedinaJordi Llorca
    Resumen:
    DOI: 10.1016/j.apsusc.2016.11.037 URL: http://www.sciencedirect.com/science/article/pii/S0169433216323959 Filiació URV: SI Inclòs a la memòria: SI
  • Otros:

    Autor según el artículo: Mayra G. Álvarez; Didier Tichit; Francesc Medina; Jordi Llorca
    Departamento: Enginyeria Química
    Autor/es de la URV: GARCÍA ALVAREZ, MAYRA; Didier Tichit; MEDINA CABELLO, FRANCISCO; Jordi Llorca
    Palabras clave: graphene graphene oxide Hydrotalcite
    Resumen: Layered double hydroxides (LDH or HT) or their derived mixed oxides present marked acid-base properties useful in catalysis, but they lead to agglomerate inducing a weak accessibility to the active sites. In this study we report the preparation and characterization of HT/Graphene (HT/rGO) nanocomposites as active and selective basic catalysts for the acetone condensation reaction. The graphene high specific surface area and structural compatibility with the HT allowed increasing the number and accessibility of the active sites and activity of this later. Two series of HT/rGO nanocomposites with 0.5 ≤ HT/rGO ≤ 10 mass ratio were prepared by: i) direct HT coprecipitation in the presence of GO; ii) self-assembly of preformed HT with GO. The prepared HT/rGO nanocomposites were dried either in air at 80 °C or freeze-dried. A series of characterizations showed the great influence of the preparation method and HT/rGO mass ratio on both the nanocomposite structure and catalytic activity. An optimum activity was observed for a HT/rGO = 10 catalyst. Particularly, the highest catalytic activity was found in those nanocomposites obtained by coprecipitation and freeze dried (3 times more active than bulk HT) which can be connected to their structure with a better accessibility to the basic sites.
    Grupo de investigación: Catàlisi heterogènia
    Áreas temáticas: Enginyeria química Ingeniería química Chemical engineering
    Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 0169-4332
    Identificador del autor: 0000-0002-9930-6709; n/a; 0000-0002-3111-1542; 0000-0002-7447-9582
    Fecha de alta del registro: 2017-01-18
    Página final: 831
    Volumen de revista: 396
    Versión del articulo depositado: info:eu-repo/semantics/acceptedVersion
    Enlace a la fuente original: https://www.sciencedirect.com/science/article/abs/pii/S0169433216323959?via%3Dihub
    URL Documento de licencia: https://repositori.urv.cat/ca/proteccio-de-dades/
    DOI del artículo: 10.1016/j.apsusc.2016.11.037
    Entidad: Universitat Rovira i Virgili
    Año de publicación de la revista: 2017
    Página inicial: 821
    Tipo de publicación: Article Artículo Article
  • Palabras clave:

    Catàlisi heterogènia
    Grafè
    graphene
    graphene oxide
    Hydrotalcite
    Enginyeria química
    Ingeniería química
    Chemical engineering
    0169-4332
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