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Issue 20, 2013
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Towards mesoporous Keggin-type polyoxometalates – systematic study on organic template removal

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Abstract

Here, we present systematic studies on the removal of the polymer template from inverse hexagonally ordered poly(butadiene-block-2-dimethylaminoethyl methacrylate)–phosphomolybdic acid (H3PMo12O40) nanocomposites. Highly ordered mesophases are obtained via an evaporation-induced self-assembly process. Different techniques are used to remove the organic template: direct calcination in air, a two-step heat treatment ((1) argon atmosphere and (2) oxidative atmosphere), and a combination of heat and plasma treatment. Our studies show that direct calcination in air and two-step heat treatment lead to a collapse of mesostructure before complete carbon removal is accomplished. In contrast, plasma etching of heat treated ultra-microtomed samples results in hexagonally ordered porous nanofilms.

Graphical abstract: Towards mesoporous Keggin-type polyoxometalates – systematic study on organic template removal

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Supplementary files

Article information


Submitted
22 Jan 2013
Accepted
27 Mar 2013
First published
28 Mar 2013

J. Mater. Chem. A, 2013,1, 6238-6248
Article type
Paper

Towards mesoporous Keggin-type polyoxometalates – systematic study on organic template removal

T. Lunkenbein, M. Kamperman, M. Schieder, S. With, Z. Li, H. Sai, S. Förster, U. Wiesner and J. Breu, J. Mater. Chem. A, 2013, 1, 6238
DOI: 10.1039/C3TA10333A

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