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Issue 3, 2010
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Synthesis of ellipsoidal hematite/polymer/titania hybrid materials and the corresponding hollow ellipsoidal particles

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Abstract

Ellipsoidal tri-layer hematite/poly(N,N′-methylenebisacrylamide-co-methacrylic acid)/titania (Fe2O3/P(MBA-co-MAA)/TiO2) hybrid materials were prepared by a three-stage reaction process, which included the combination of the controlled hydrolysis of inorganic salt to afford ellipsoidal hematite core and titania shell layer and distillation precipitation copolymerization of N,N′-methylenebisacrylamide (MBA) and methacrylic acid (MAA) in acetonitrile for the formation of a P(MBA-co-MAA) sandwiched mid-layer. The corresponding hollow ellipsoidal hematite-sphere-in-titania-spheres were afforded by selective removal of the sandwiched P(MBA-co-MAA) mid-layer viacalcination. Hollow titania ellipsoids were further obtained by selectively etching the hematite core in aqueous hydrofluoric acid (HF) solution from the ellipsoidal hematite-sphere-in-titania-sphere. The resultant ellipsoidal tri-layer Fe2O3/P(MBA-co-MAA)/TiO2 and the corresponding hollow ellipsoidal particles were confirmed by transmission electron microscopy (TEM), Fourier transform infrared spectroscopy, X-ray diffraction (XRD), thermogravimetric (TGA) analysis and vibrating sample magnetometery (VSM).

Graphical abstract: Synthesis of ellipsoidal hematite/polymer/titania hybrid materials and the corresponding hollow ellipsoidal particles

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Article information


Submitted
01 Sep 2009
Accepted
15 Oct 2009
First published
16 Dec 2009

Polym. Chem., 2010,1, 289-295
Article type
Paper

Synthesis of ellipsoidal hematite/polymer/titania hybrid materials and the corresponding hollow ellipsoidal particles

L. Li, D. Qin, X. Yang and G. Liu, Polym. Chem., 2010, 1, 289
DOI: 10.1039/B9PY00230H

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