bei Google ScholarTitelangaben
Lunkenbein, Thomas ; Kamperman, Marleen ; Schieder, Martin ; With, Sebastian ; Li, Zihui ; Sai, Hiroaki ; Förster, Stephan ; Wiesner, Ulrich ; Breu, Josef:
Towards mesoporous Keggin-type polyoxometalates : systematic study on organic template removal.
In: Journal of Materials Chemistry A.
Bd. 1
(2013)
Heft 20
.
- S. 6238-6248.
ISSN 2050-7496
DOI: https://doi.org/10.1039/C3TA10333A
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.