Porous Alkaline‑Earth Doped Multiwall Carbon Nanotubes with Base Catalytic Properties

Barrios‑Bermúdez, N., Santos‑Granados, J, Calvino‑Casilda, V, Cerpa‑Naranjo, A, Rojas‑Cervantes, M.L. y Moreno, Rodrigo . (2019) Porous Alkaline‑Earth Doped Multiwall Carbon Nanotubes with Base Catalytic Properties. Catalysis Letters

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Título Porous Alkaline‑Earth Doped Multiwall Carbon Nanotubes with Base Catalytic Properties
Autor(es) Barrios‑Bermúdez, N.
Santos‑Granados, J
Calvino‑Casilda, V
Cerpa‑Naranjo, A
Rojas‑Cervantes, M.L.
Moreno, Rodrigo
Materia(s) Química
Abstract Alkaline-earth doped multiwall carbon nanotubes, M-CNT (M=Mg, Ca, Sr, Ba) have been prepared by a combined method of ionic exchange and precipitation. The wide characterization of the solids by nitrogen adsorption, ATR–FTIR, thermal analysis, XRD, scanning electron microscopy, transmission electron microscopy, point of zero charge (PZC), and X-ray photoelectron spectroscopy shows that the incorporation of M to the CNTs has been successfully produced. The doping with the alkaline-earth cations causes a decrease in the SBET value of the raw material, mainly due to the blockage of mesopores by the metal carbonate phase formed in most of cases. This metallic phase also contributes to the destabilization of the nanotubes by promoting their oxidation. According to PZC values, the acid character of oxidized CNTs changes to basic for the M-CNT series, Mg-CNT showing the highest PZC value. The basic properties of the catalysts have been tested in the C–C bond forming reaction of Knoevenagel, by carrying out the condensation of ethyl cyanoacetate with benzaldehyde or 4-methoxybenzaldehyde.
Palabras clave Alkaline-earth doped carbon nanotubes
Surface and Bulk characterization
Base catalysts
Editor(es) Springer
Fecha 2019-05-04
Formato application/pdf
Identificador bibliuned:DptoQIyQT-FCIE-Articulos-Mlrojas-0004
http://e-spacio.uned.es/fez/view/bibliuned:DptoQIyQT-FCIE-Articulos-Mlrojas-0004
DOI - identifier https://doi.org/10.1007/s10562-019-02807-6
ISSN - identifier 1011-372X; eISSN 1572-879X
Nombre de la revista Catalysis Letters
Número de Volumen 149
Página inicial 2279
Página final 2290
Publicado en la Revista Catalysis Letters
Idioma eng
Versión de la publicación acceptedVersion
Tipo de recurso Article
Derechos de acceso y licencia http://creativecommons.org/licenses/by-nc-nd/4.0
info:eu-repo/semantics/openAccess
Tipo de acceso Acceso embargado
Notas adicionales La versión registrada de este artículo, publicada por primera vez en Catalysis Letters (2019) 149, p 2279–2290, está disponible en línea en el sitio web de la editorial: Springer, https://doi.org/10.1007/s10562-019-02807-6
Notas adicionales The registered version of this article, first published in Catalysis Letters (2019) 149, p 2279–2290, is available online at the publisher's website: Springer, https://doi.org/10.1007/s10562-019-02807-6

Tipo de documento: Artículo de revista
Collection: Departamento de Química Inorgánica y Química Técnica (UNED). Artículos
 
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Creado: Thu, 22 Feb 2024, 00:51:02 CET