Preparation and characterization of bentonite nanocomposites via sol–gel process

Different nanocomposites silica-resin based were prepared and characterized in order to achieve a porous monolith that contains bentonite and allows the flow of aqueous systems. The bentonite used to prepare the nanocomposites was a good adsorbent for various molecules in aqueous media in stirred ta...

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Autores principales: Legarto, María Celeste, Scian, Alberto Néstor, Lombardi, María Bárbara
Formato: Articulo
Lenguaje:Inglés
Publicado: 2019
Materias:
Química
Adsorbent material
Nanoporous material
Silica-resin composite
Silica-resin-bentonite composite
Silicaresin-bentonite-carbon composite
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/123579
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-123579
record_format dspace
spelling I19-R120-10915-1235792023-04-12T12:58:43Z http://sedici.unlp.edu.ar/handle/10915/123579 issn:2523-3963 issn:2523-3971 Preparation and characterization of bentonite nanocomposites via sol–gel process Legarto, María Celeste Scian, Alberto Néstor Lombardi, María Bárbara 2019 2021-08-26T17:55:26Z en Química Adsorbent material Nanoporous material Silica-resin composite Silica-resin-bentonite composite Silicaresin-bentonite-carbon composite Different nanocomposites silica-resin based were prepared and characterized in order to achieve a porous monolith that contains bentonite and allows the flow of aqueous systems. The bentonite used to prepare the nanocomposites was a good adsorbent for various molecules in aqueous media in stirred tank reactor. But the challenge was the obtention of porous bentonite composite columns for industrial applications. The primary composite, silica-resin, was prepared by the sol–gel precursor mixture of the tetraethylorthosilicate (TEOS) and a phenolic resin, made up the gel which is then dried and cured at 180 °C. Bentonite was added to the precursor mixture obtaining the, silica-resin-bentonite composite, and also other potencial adsorbent, carbon, was added obtaining the silica-resin-bentonite-carbon composite. The different composites were mineralogical and structurally evaluated by X-ray diffraction, Infrared spectroscopy with Fourier transform, Differential thermal analyses and thermogravimetric analyses. The textural characterization was performed by Adsorption of nitrogen (Sg-BET), Mercury intrusion porosimetry and Scanning electron microscopy. The comparison of the characteristics and properties between the composites evidenced that the addition of bentonite modify the sol–gel process and interferes in the composite cured process, so that, modify the mesoporosity and macroporosity of the composite. But, there is a maximum clay limit to obtain an homogeneous monolith. The addition of carbon decreases the porosity of the composite to a greater extent when the granulometry is greater. Centro de Tecnología de Recursos Minerales y Cerámica Articulo Articulo http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf 1-7
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
Adsorbent material
Nanoporous material
Silica-resin composite
Silica-resin-bentonite composite
Silicaresin-bentonite-carbon composite
spellingShingle Química
Adsorbent material
Nanoporous material
Silica-resin composite
Silica-resin-bentonite composite
Silicaresin-bentonite-carbon composite
Legarto, María Celeste
Scian, Alberto Néstor
Lombardi, María Bárbara
Preparation and characterization of bentonite nanocomposites via sol–gel process
topic_facet Química
Adsorbent material
Nanoporous material
Silica-resin composite
Silica-resin-bentonite composite
Silicaresin-bentonite-carbon composite
description Different nanocomposites silica-resin based were prepared and characterized in order to achieve a porous monolith that contains bentonite and allows the flow of aqueous systems. The bentonite used to prepare the nanocomposites was a good adsorbent for various molecules in aqueous media in stirred tank reactor. But the challenge was the obtention of porous bentonite composite columns for industrial applications. The primary composite, silica-resin, was prepared by the sol–gel precursor mixture of the tetraethylorthosilicate (TEOS) and a phenolic resin, made up the gel which is then dried and cured at 180 °C. Bentonite was added to the precursor mixture obtaining the, silica-resin-bentonite composite, and also other potencial adsorbent, carbon, was added obtaining the silica-resin-bentonite-carbon composite. The different composites were mineralogical and structurally evaluated by X-ray diffraction, Infrared spectroscopy with Fourier transform, Differential thermal analyses and thermogravimetric analyses. The textural characterization was performed by Adsorption of nitrogen (Sg-BET), Mercury intrusion porosimetry and Scanning electron microscopy. The comparison of the characteristics and properties between the composites evidenced that the addition of bentonite modify the sol–gel process and interferes in the composite cured process, so that, modify the mesoporosity and macroporosity of the composite. But, there is a maximum clay limit to obtain an homogeneous monolith. The addition of carbon decreases the porosity of the composite to a greater extent when the granulometry is greater.
format Articulo
Articulo
author Legarto, María Celeste
Scian, Alberto Néstor
Lombardi, María Bárbara
author_facet Legarto, María Celeste
Scian, Alberto Néstor
Lombardi, María Bárbara
author_sort Legarto, María Celeste
title Preparation and characterization of bentonite nanocomposites via sol–gel process
title_short Preparation and characterization of bentonite nanocomposites via sol–gel process
title_full Preparation and characterization of bentonite nanocomposites via sol–gel process
title_fullStr Preparation and characterization of bentonite nanocomposites via sol–gel process
title_full_unstemmed Preparation and characterization of bentonite nanocomposites via sol–gel process
title_sort preparation and characterization of bentonite nanocomposites via sol–gel process
publishDate 2019
url http://sedici.unlp.edu.ar/handle/10915/123579
work_keys_str_mv AT legartomariaceleste preparationandcharacterizationofbentonitenanocompositesviasolgelprocess
AT scianalbertonestor preparationandcharacterizationofbentonitenanocompositesviasolgelprocess
AT lombardimariabarbara preparationandcharacterizationofbentonitenanocompositesviasolgelprocess
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