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Issue 11, 2013
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Sol–gel synthesis of zinc ferrite-based xerogel monoliths with well-defined macropores

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Abstract

Starting from an aqueous solution, porous zinc ferrite-based xerogel monoliths have been prepared via a sol–gel route accompanied by phase separation mediated by propylene oxide in the presence of poly(acrylamide). The xerogels possess well-defined macropores, and the macroporous morphologies could be easily controlled (macropore size ranges from 0.55 to 1.29 μm) by simply changing the starting composition. As-dried xerogel samples were amorphous under X-ray diffraction, while heat-treatment in air brought about the formation of spinel type ferrite phase, ZnFe2O4. Calcination under Ar atmosphere allowed the crystallization of various iron-based phases/carbon composites (Fe3O4, Fe1-δO, Fe3N, Fe4N, Fe3C, and Fe). Samples heated under Ar flow exhibited hierarchical pore structures, including continuous macropores, in addition to mesopores and micropores embedded in the carbon-containing composite matrices.

Graphical abstract: Sol–gel synthesis of zinc ferrite-based xerogel monoliths with well-defined macropores

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Publication details

The article was received on 11 Oct 2012, accepted on 09 Jan 2013 and first published on 10 Jan 2013


Article type: Paper
DOI: 10.1039/C3RA22481C
RSC Adv., 2013,3, 3661-3666

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    Sol–gel synthesis of zinc ferrite-based xerogel monoliths with well-defined macropores

    Y. Kido, K. Nakanishi and K. Kanamori, RSC Adv., 2013, 3, 3661
    DOI: 10.1039/C3RA22481C

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