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Artículo

Iron oxide nanoparticles inside the MCM-41 channels: Study of the structural stability of the support

Bengoa, Jose Fernando; Cagnoli, Maria VirginiaIcon ; Gallegos, Norma GracielaIcon ; Alvarez, Ana MaríaIcon ; Mogni, Liliana VerónicaIcon ; Moreno, Mario Sergio JesusIcon ; Marchetti, Sergio GustavoIcon
Fecha de publicación: 09/2005
Editorial: Elsevier Science
Revista: Microporous and Mesoporous Materials
ISSN: 1387-1811
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ciencias Químicas

Resumen

We report the synthesis of the MCM-41 mesoporous solid chosen as support of Fe nanoparticles, which yields a narrow distribution of oxide crystal sizes. MCM-41 was synthesized in two different ways, with and without pH adjustment during the synthesis process, and impregnated by different methods with iron salts. They were characterized by atomic absorption spectroscopy, N2 adsorption, X-ray diffraction, Mössbauer spectroscopy, high-resolution scanning transmission electron microscopy equipped with a high-angle annular dark-field detector, high-resolution transmission electron microscopy and energy dispersive X-ray spectroscopy. When the support was synthesized without pH adjustment the preparation steps of the supported system, the water destroys the regular structure of hexagonal channels of the mesoporous solid. The structure is preserved when the support is synthesized with pH adjustment during the synthesis process due to its higher pore-wall thickness. In addition, this system has a higher percentage of the iron oxide nanocrystals located inside the channels of the support. © 2005 Elsevier Inc. All rights reserved.
Palabras clave: Fe/Mcm-41 , Iron Oxide Nanoparticles , Mesoporous Material , MÖSsbauer Spectroscopy , Stem-Haadf
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/57692
DOI: https://dx.doi.org/10.1016/j.micromeso.2005.05.018
URL: https://www.sciencedirect.com/science/article/pii/S1387181105002106
Colecciones
Articulos(CCT - PATAGONIA NORTE)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Articulos(CINDECA)
Articulos de CENTRO DE INV EN CS.APLICADAS "DR.JORGE J.RONCO"
Citación
Bengoa, Jose Fernando; Cagnoli, Maria Virginia; Gallegos, Norma Graciela; Alvarez, Ana María; Mogni, Liliana Verónica; et al.; Iron oxide nanoparticles inside the MCM-41 channels: Study of the structural stability of the support; Elsevier Science; Microporous and Mesoporous Materials; 84; 1-3; 9-2005; 153-160
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