Issue 11, 2013
From the journal:

RSC Advances

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

Yasuki Kido,a   Kazuki Nakanishi*a  and  Kazuyoshi Kanamoria  

* Corresponding authors

a Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa, Sakyo-ku, Kyoto 606-8502, Japan
E-mail: kazuki@kuchem.kyoto-u.ac.jp
Fax: +81-75-753-2925
Tel: +81-75-753-2925

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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Article information

DOI
https://doi.org/10.1039/C3RA22481C
Article type
Paper
Submitted
11 Oct 2012
Accepted
09 Jan 2013
First published
10 Jan 2013

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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