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The synthesis of Al-MCM-41 from volclay — A low-cost Al and Si source
Authors:M Adjdir  T Ali-Dahmane  F Friedrich  T Scherer  PG Weidler
Affiliation:aInstitut für Funktionelle Grenzflächen (IFG), Division of Nanomineralogy Forschungszentrum Karlsruhe GmbH, D-76021 Karlruhe, Germany;bMaterials Chemical Laboratory, University of Oran, BO: 31100 Oran Es-Sénia, Algeria;cInstitute for Nanotechnology Forschungszentrum Karlsruhe, GmbH D-76021 Karlsruhe, Germany
Abstract:The alkaline fusion of volclay (a low-cost sodium exchanged smectite) was used as source to generate the Si and Al components which were effectively transformed into mesoporous Al-MCM-41 depending on hydrothermal condition. The Al-MCM-41 materials were investigated by powder X-ray diffraction (XRD), N2 adsorption–desorption measurements and both scanning electron microscopy (SEM) and environmental scanning electron microscopy (ESEM). The volclay which converted into a silicon and an aluminium source allowed the formation of well ordered mesoporous Al-MCM-41 materials with high aluminium content (roughly 4 times higher than a Al-MCM-41 produced by a standard method), a high specific surface area (1060 m2/g), a pore volume of 0.8 cm3/g (for pore width < 7.1 nm) with an mono-modal pore distribution with a maximum in the mesoporous pore size of 3.8 nm in pore width.
Keywords:Al-MCM-41  Volclay  Fusion  Supernatant  Mesoporous
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