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Issue 23, 2010
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Highly porous and monodisperse magnetic silica beads prepared by a green templating method

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Abstract

We describe the preparation of magnetic silica nanocomposite millimetric beads using alginate as a green biopolymer template. The simple and soft method which is used here is particularly suitable since the alginate template allows a multiscale control of the structure of the material, both its morphological characteristics at the millimetric scale and its porosity at the nanometric level. These nanocomposites are characterised by a high monodispersity, a perfect spherical shape, a very large and multiscale porosity with pore diameters ranging from 2 nm to more than 50 nm, a homogeneous dispersion of the magnetic nanoparticles in the silica matrix and a high magnetic susceptibility which increases linearly with the volume fraction of the nanoparticles. These highly porous materials which can be used as magnetic adsorbents in water treatment, showed a good sorption capacity for methylene blue, chosen as a model dye.

Graphical abstract: Highly porous and monodisperse magnetic silica beads prepared by a green templating method

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Supplementary files

Article information


Submitted
11 Jan 2010
Accepted
08 Mar 2010
First published
26 Apr 2010

J. Mater. Chem., 2010,20, 4916-4924
Article type
Paper

Highly porous and monodisperse magnetic silica beads prepared by a green templating method

S. Abramson, C. Meiller, P. Beaunier, V. Dupuis, L. Perrigaud, A. Bée and V. Cabuil, J. Mater. Chem., 2010, 20, 4916
DOI: 10.1039/C000525H

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