title: Nanoporous composites prepared by a combination of SBA-15 with Mg-Al mixed oxides. Water vapor sorption properties.
abstract: This work presents two easy ways for preparing nanostructured mesoporous composites by interconnecting and combining SBA-15 with mixed oxides derived from a calcined Mg-Al hydrotalcite. Two different Mg-Al hydrotalcite addition procedures were implemented, either after or during the SBA-15 synthesis (in situ method). The first procedure, i.e., the post-synthesis method, produces a composite material with Mg-Al mixed oxides homogeneously dispersed on the SBA-15 nanoporous surface. The resulting composites present textural properties similar to the SBA-15. On the other hand, with the second procedure (in situ method), Mg and Al mixed oxides occur on the porous composite, which displays a cauliflower morphology. This is an important microporosity contribution and micro and mesoporous surfaces coexist in almost the same proportion. Furthermore, the nanostructured mesoporous composites present an extraordinary water vapor sorption capacity. Such composites might be utilized as as acid-base catalysts, adsorbents, sensors or storage nanomaterials.
authors.affiliation: Benemérita Universidad Autónoma de Puebla, Facultad de Ingeniería Química, Ciudad Universitaria, 72570, Puebla, PUE, Mexico.
authors.forename: Amaury
authors.initials: A
authors.lastname: Pérez-Verdejo
authors.affiliation: Benemérita Universidad Autónoma de Puebla, Facultad de Ingeniería Química, Ciudad Universitaria, 72570, Puebla, PUE, Mexico.
authors.forename: Alvaro
authors.initials: A
authors.lastname: Sampieri
authors.affiliation: Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito exterior s/n, Cd. Universitaria, Del. Coyoacán, 04510, México DF, Mexico.
authors.forename: Heriberto
authors.initials: H
authors.lastname: Pfeiffer
authors.affiliation: Benemérita Universidad Autónoma de Puebla, Facultad de Ingeniería Química, Ciudad Universitaria, 72570, Puebla, PUE, Mexico.
authors.forename: Mayra
authors.initials: M
authors.lastname: Ruiz-Reyes
authors.affiliation: Benemérita Universidad Autónoma de Puebla, Facultad de Ingeniería Química, Ciudad Universitaria, 72570, Puebla, PUE, Mexico.
authors.forename: Juana-Deisy
authors.initials: JD
authors.lastname: Santamaría
authors.affiliation: Benemérita Universidad Autónoma de Puebla, Facultad de Ciencias Químicas, Ciudad Universitaria, 72570, Puebla, PUE, Mexico.
authors.forename: Geolar
authors.initials: G
authors.lastname: Fetter
keywords: SBA-15; calcined Mg–Al hydrotalcite; nanoporous composites; vapor sorption