Preparation and Characterization of Textural and Energetic Parameters of Common and Functionalized SBA-15 Mesoporous Silicas

A set of SBA-15 ordered mesoporous silicas presenting different surface acidities was obtained by organo-functionalization. Amino and sulphonic groups were attached onto the silica surface in order to determine the influence of organo-functionalization with acidic and basic moieties on the adsorptio...

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Detalles Bibliográficos
Autores principales: Vargas, Diana P., Legnoverde, María Soledad, Giraldo, Liliana, Basaldella, Elena Isabel, Moreno Piraján, Juan Carlos
Formato: Articulo
Lenguaje:Inglés
Publicado: 2010
Materias:
Química
Ciencias Exactas
silicas
Cephalexin
scanning electron microscopy
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/123767
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-123767
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
Ciencias Exactas
silicas
Cephalexin
scanning electron microscopy
spellingShingle Química
Ciencias Exactas
silicas
Cephalexin
scanning electron microscopy
Vargas, Diana P.
Legnoverde, María Soledad
Giraldo, Liliana
Basaldella, Elena Isabel
Moreno Piraján, Juan Carlos
Preparation and Characterization of Textural and Energetic Parameters of Common and Functionalized SBA-15 Mesoporous Silicas
topic_facet Química
Ciencias Exactas
silicas
Cephalexin
scanning electron microscopy
description A set of SBA-15 ordered mesoporous silicas presenting different surface acidities was obtained by organo-functionalization. Amino and sulphonic groups were attached onto the silica surface in order to determine the influence of organo-functionalization with acidic and basic moieties on the adsorption properties of silica. Cephalexin, an antibiotic molecule characterized by its zwitterionic nature, was selected as the adsorbate. The obtained matrices were characterized by scanning electron microscopy, energy dispersive X-ray analysis and nitrogen adsorption isotherms at 77 K. Enthalpies of immersion into water, benzene and cephalexin solutions were measured by immersion calorimetry, and the cephalexin adsorption capacities of the different matrices were also determined. The structure of SBA-15 was conserved in the functionalized samples despite a noticeable reduction in the BET surface area, pore volume and pore size. It was found that the inclusion of amino groups promoted interaction between the adsorbent and adsorbate, thereby favouring the retention of cephalexin.
format Articulo
Articulo
author Vargas, Diana P.
Legnoverde, María Soledad
Giraldo, Liliana
Basaldella, Elena Isabel
Moreno Piraján, Juan Carlos
author_facet Vargas, Diana P.
Legnoverde, María Soledad
Giraldo, Liliana
Basaldella, Elena Isabel
Moreno Piraján, Juan Carlos
author_sort Vargas, Diana P.
title Preparation and Characterization of Textural and Energetic Parameters of Common and Functionalized SBA-15 Mesoporous Silicas
title_short Preparation and Characterization of Textural and Energetic Parameters of Common and Functionalized SBA-15 Mesoporous Silicas
title_full Preparation and Characterization of Textural and Energetic Parameters of Common and Functionalized SBA-15 Mesoporous Silicas
title_fullStr Preparation and Characterization of Textural and Energetic Parameters of Common and Functionalized SBA-15 Mesoporous Silicas
title_full_unstemmed Preparation and Characterization of Textural and Energetic Parameters of Common and Functionalized SBA-15 Mesoporous Silicas
title_sort preparation and characterization of textural and energetic parameters of common and functionalized sba-15 mesoporous silicas
publishDate 2010
url http://sedici.unlp.edu.ar/handle/10915/123767
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