Preparation of Al/Fe-pillared clays: effect of the starting mineral

Muñoz Alvear, Helir Joseph; Blanco, Carolina; Gil Bravo, Antonio; Vicente, Miguel Ángel; Galeano, Luis Alejandro

Publication:
Preparation of Al/Fe-pillared clays: effect of the starting mineral

dc.contributor.author	Muñoz Alvear, Helir Joseph	es_ES
dc.contributor.author	Blanco, Carolina	es_ES
dc.contributor.author	Gil Bravo, Antonio
dc.contributor.author	Vicente, Miguel Ángel	es_ES
dc.contributor.author	Galeano, Luis Alejandro	es_ES
dc.contributor.department	Química Aplicada	es_ES
dc.contributor.department	Kimika Aplikatua	eu
dc.date.accessioned	2018-09-05T12:23:25Z
dc.date.available	2018-09-05T12:23:25Z
dc.date.issued	2017
dc.description.abstract	Four natural clays were modified with mixed polyoxocations of Al/Fe for evaluating the effect of the physicochemical properties of the starting materials (chemical composition, abundance of expandable clay phases, cationic exchange capacity and textural properties) on final physicochemical and catalytic properties of Al/Fe-PILCs. The aluminosilicate denoted C2 exhibited the highest potential as starting material in the preparation of Al/Fe-PILC catalysts, mainly due to its starting cationic exchange capacity (192 meq/100 g) and the dioctahedral nature of the smectite phase. These characteristics favored the intercalation of the mixed (Al13􀀀x/Fex)7+ Keggin-type polyoxocations, stabilizing a basal spacing of 17.4 Å and high increase of the BET surface (194 m2/g), mainly represented in microporous content. According to H2-TPR analyses, catalytic performance of the incorporated Fe in the CatalyticWet Peroxide Oxidation (CWPO) reaction strongly depends on the level of location in mixed Al/Fe pillars. Altogether, such physicochemical characteristics promoted high performance in CWPO catalytic degradation of methyl orange in aqueous medium at very mild reaction temperatures (25.0 1.0 C) and pressure (76 kPa), achieving TOC removal of 52% and 70% of azo-dye decolourization in only 75 min of reaction under very low concentration of clay catalyst (0.05 g/L).	en
dc.description.sponsorship	The financial support from Proyecto Agua Potable Nariño (BPIN 2014000100020), CT&I Fund of the SGR—Colombia is kindly acknowledged. HJM also gratefully thanks the MSc scholarship granted by Departamento de Nariño (BPIN 2013000100092) and managed by CEIBA Foundation, Colombia. M.A.V. and A.G. thank the support from the Spanish Ministry of Economy and Competitiveness (MINECO) and the European Regional Development Fund (FEDER) (projects MAT2013-47811-C2-R and MAT2016-78863-C2-R). A.G. is also grateful for financial support from Santander Bank through the Research Intensification Program.	en
dc.format.extent	18 p.
dc.format.mimetype	application/pdf	en
dc.format.mimetype	application/zip	en
dc.identifier.doi	10.3390/ma10121364
dc.identifier.issn	1996-1944
dc.identifier.uri	https://academica-e.unavarra.es/handle/2454/30518
dc.language.iso	eng	en
dc.publisher	MDPI	en
dc.relation.ispartof	Materials, 2017, 10, 1364	en
dc.relation.projectID	info:eu-repo/grantAgreement/MINECO//MAT2013-47811-C2-1-R/ES/	en
dc.relation.projectID	info:eu-repo/grantAgreement/ES/1PE/MAT2016-78863	en
dc.relation.publisherversion	https://doi.org/10.3390/ma10121364
dc.rights	© 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution.	en
dc.rights.accessRights	info:eu-repo/semantics/openAccess	en
dc.rights.accessRights	Acceso abierto / Sarbide irekia	es
dc.rights.uri	https://creativecommons.org/licenses/by/4.0/
dc.subject	Smectite	en
dc.subject	Pillared clay	en
dc.subject	Keggin-like mixed Al/Fe polyoxocation	en
dc.subject	Mineralogical composition	en
dc.subject	Catalytic wet peroxide oxidation	en
dc.title	Preparation of Al/Fe-pillared clays: effect of the starting mineral	en
dc.type	info:eu-repo/semantics/article	en
dc.type	Artículo / Artikulua	es
dc.type.version	info:eu-repo/semantics/publishedVersion	en
dc.type.version	Versión publicada / Argitaratu den bertsioa	es
dspace.entity.type	Publication
relation.isAuthorOfPublication	cd12e590-cb42-47d5-a642-f60eeee624ec
relation.isAuthorOfPublication.latestForDiscovery	cd12e590-cb42-47d5-a642-f60eeee624ec