Porous materials obtained by acid treatment processing followed by pillaring of montmorillonite clays

Montmorillonite clay was treated with hydrochloric acid and subsequently pillared with aluminum polyoxocations. The acid-treated samples were evaluated for the removal of structural elements (Al, Fe and Mg) and for conservation of the lamellar organization. The more severe the treatment, the greater...

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Principais autores:	Bieseki, Lindiane, Treichel, Helen, Araujo, Antonio S., Pergher, Sibele Berenice Castellã
Formato:	article
Idioma:	English
Publicado em:	Elsevier
Assuntos:	Montmorillonite clay Acid treatment Pillaring
Endereço do item:	https://repositorio.ufrn.br/jspui/handle/123456789/29395
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id	ri-123456789-29395
record_format	dspace
spelling	ri-123456789-293952022-12-14T21:00:49Z Porous materials obtained by acid treatment processing followed by pillaring of montmorillonite clays Bieseki, Lindiane Treichel, Helen Araujo, Antonio S. Pergher, Sibele Berenice Castellã Montmorillonite clay Acid treatment Pillaring Montmorillonite clay was treated with hydrochloric acid and subsequently pillared with aluminum polyoxocations. The acid-treated samples were evaluated for the removal of structural elements (Al, Fe and Mg) and for conservation of the lamellar organization. The more severe the treatment, the greater the specific area obtained. Despite the loss of structural organization, all samples were pillared, with a displacement of peak (001) to 2θ lower angles. The pillaring of all acid-treated samples promoted an increase in the specific area of these materials. Pillared samples previously treated at 50 °C with HCl concentrations of 2 and 4 mol L− 1 underwent an increase in their specific areas of approximately 45%. Pillared samples treated with 4 mol L− 1 of HCl at 80 °C underwent the lowest percent increase in surface area, approximately 10%, compared to the untreated samples. All samples possessed greater uniformity in pore size. Acid treatment prior to pillaring promoted an increase in the number of acid sites of moderate strength compared to pillared natural clay. 2020-07-01T09:51:37Z 2020-07-01T09:51:37Z 2013-11 article BIESEKI, Lindiane; TREICHEL, Helen; ARAUJO, Antonio S.; PERGHER, Sibele Berenice Castellã. Porous materials obtained by acid treatment processing followed by pillaring of montmorillonite clays. Applied Clay Science, [s.l.], v. 85, p. 46-52, nov. 2013. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0169131713002901. Acesso em 19 maio 2020. https://doi.org/10.1016/j.clay.2013.08.044 0169-1317 https://repositorio.ufrn.br/jspui/handle/123456789/29395 10.1016/j.clay.2013.08.044 en Elsevier
institution	Repositório Institucional
collection	RI - UFRN
language	English
topic	Montmorillonite clay Acid treatment Pillaring
spellingShingle	Montmorillonite clay Acid treatment Pillaring Bieseki, Lindiane Treichel, Helen Araujo, Antonio S. Pergher, Sibele Berenice Castellã Porous materials obtained by acid treatment processing followed by pillaring of montmorillonite clays
description	Montmorillonite clay was treated with hydrochloric acid and subsequently pillared with aluminum polyoxocations. The acid-treated samples were evaluated for the removal of structural elements (Al, Fe and Mg) and for conservation of the lamellar organization. The more severe the treatment, the greater the specific area obtained. Despite the loss of structural organization, all samples were pillared, with a displacement of peak (001) to 2θ lower angles. The pillaring of all acid-treated samples promoted an increase in the specific area of these materials. Pillared samples previously treated at 50 °C with HCl concentrations of 2 and 4 mol L− 1 underwent an increase in their specific areas of approximately 45%. Pillared samples treated with 4 mol L− 1 of HCl at 80 °C underwent the lowest percent increase in surface area, approximately 10%, compared to the untreated samples. All samples possessed greater uniformity in pore size. Acid treatment prior to pillaring promoted an increase in the number of acid sites of moderate strength compared to pillared natural clay.
format	article
author	Bieseki, Lindiane Treichel, Helen Araujo, Antonio S. Pergher, Sibele Berenice Castellã
author_facet	Bieseki, Lindiane Treichel, Helen Araujo, Antonio S. Pergher, Sibele Berenice Castellã
author_sort	Bieseki, Lindiane
title	Porous materials obtained by acid treatment processing followed by pillaring of montmorillonite clays
title_short	Porous materials obtained by acid treatment processing followed by pillaring of montmorillonite clays
title_full	Porous materials obtained by acid treatment processing followed by pillaring of montmorillonite clays
title_fullStr	Porous materials obtained by acid treatment processing followed by pillaring of montmorillonite clays
title_full_unstemmed	Porous materials obtained by acid treatment processing followed by pillaring of montmorillonite clays
title_sort	porous materials obtained by acid treatment processing followed by pillaring of montmorillonite clays
publisher	Elsevier
publishDate	2020
url	https://repositorio.ufrn.br/jspui/handle/123456789/29395
work_keys_str_mv	AT biesekilindiane porousmaterialsobtainedbyacidtreatmentprocessingfollowedbypillaringofmontmorilloniteclays AT treichelhelen porousmaterialsobtainedbyacidtreatmentprocessingfollowedbypillaringofmontmorilloniteclays AT araujoantonios porousmaterialsobtainedbyacidtreatmentprocessingfollowedbypillaringofmontmorilloniteclays AT perghersibeleberenicecastella porousmaterialsobtainedbyacidtreatmentprocessingfollowedbypillaringofmontmorilloniteclays
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Porous materials obtained by acid treatment processing followed by pillaring of montmorillonite clays

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