Muñoz Alvear, Helir Joseph

Profile Picture

Email Address

person.page.identifierURI

https://academica-e.unavarra.es/handle/2454/51693

Birth Date

Job Title

Last Name

Muñoz Alvear

First Name

Helir Joseph

person.page.departamento

Ciencias

person.page.instituteName

InaMat2. Instituto de Investigación en Materiales Avanzados y Matemáticas

ORCID

0000-0002-0481-5261

person.page.observainves

751412

person.page.upna

812201

Name

Filters

20171
Reset filters

Settings

End date: 2019 × Start date: 2017 ×

Search Results

Now showing 1 - 1 of 1
  • Thumbnail Image
    PublicationOpen Access
    Preparation of Al/Fe-pillared clays: effect of the starting mineral
    (MDPI, 2017) Muñoz Alvear, Helir Joseph; Blanco, Carolina; Gil Bravo, Antonio; Vicente, Miguel Ángel; Galeano, Luis Alejandro; Química Aplicada; Kimika Aplikatua
    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).