Synthesis and characterization of hierarchical porous materials incorporating a cubic mesoporous phase

Adonay R. Loiola, Lindomar R D Da Silva, Pablo Cubillas, Michael W. Anderson

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Hierarchical silica porous materials have been successfully synthesized using polystyrene nanospheres as macropore template, triblock copolymer Pluronic F127 as mesopore template, tetramethyl orthosilicate as silica source and ethanol as cosurfactant. The obtained materials were characterized by XRD, TG-DTA, N2 adsorption, SEM, TEM and AFM. These materials consist of a system of macropores with diameters of ca. 300 nm whose walls are filled with mesoporous material with average pore diameter 10 nm. The materials are also integrated with non-crystalline micropores. The XRD pattern indicates one sample with structure Fm3macr;m, which consists of the mesopores organized in a face-centred cubic arrangement. The hierarchical porous material created after template extraction by solvent washing exhibited a BET surface area of 277 m2 g-1. Following calcination the material has a BET surface area of 469 m2 g-1. Such properties give these materials potential for a wide range of applications in which high surface area combined with a well-defined system of pores at different length scales are required, such as adsorption, catalysis and enzyme immobilization. © The Royal Society of Chemistry 2008.
    Original languageEnglish
    Pages (from-to)4985-4993
    Number of pages8
    JournalJournal of Materials Chemistry
    Volume18
    Issue number41
    DOIs
    Publication statusPublished - 2008

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