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

T. Lunkenbein; M.M.G. Kamperman; M. Schieder; S. With; Z. Li; H. Sai; S. Forster; U. Wiesner; J. Breu

doi:10.1039/c3ta10333a

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

T. Lunkenbein, M.M.G. Kamperman, M. Schieder, S. With, Z. Li, H. Sai, S. Forster, U. Wiesner, J. Breu

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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

Original language	English
Pages (from-to)	6238-6248
Journal	Journal of Materials Chemistry. A, Materials for energy and sustainability
Volume	1
DOIs	https://doi.org/10.1039/c3ta10333a
Publication status	Published - 2013

Keywords

transition-metal oxides
catalytic-properties
building-blocks
acid catalysts
silica
molybdenum
mesostructures
nanocomposite
architectures
tungsten

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1039/c3ta10333a

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title = "Towards mesoporous Keggin-type polyoxometalates –systematic study on organic template removal",

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",

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author = "T. Lunkenbein and M.M.G. Kamperman and M. Schieder and S. With and Z. Li and H. Sai and S. Forster and U. Wiesner and J. Breu",

year = "2013",

doi = "10.1039/c3ta10333a",

language = "English",

volume = "1",

pages = "6238--6248",

journal = "Journal of Materials Chemistry. A, Materials for energy and sustainability",

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publisher = "Royal Society of Chemistry",

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T1 - Towards mesoporous Keggin-type polyoxometalates –systematic study on organic template removal

AU - Lunkenbein, T.

AU - Kamperman, M.M.G.

AU - Schieder, M.

AU - With, S.

AU - Li, Z.

AU - Sai, H.

AU - Forster, S.

AU - Wiesner, U.

AU - Breu, J.

PY - 2013

Y1 - 2013

N2 - 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

AB - 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

KW - transition-metal oxides

KW - catalytic-properties

KW - building-blocks

KW - acid catalysts

KW - silica

KW - molybdenum

KW - mesostructures

KW - nanocomposite

KW - architectures

KW - tungsten

U2 - 10.1039/c3ta10333a

DO - 10.1039/c3ta10333a

M3 - Article

SN - 2050-7488

VL - 1

SP - 6238

EP - 6248

JO - Journal of Materials Chemistry. A, Materials for energy and sustainability

JF - Journal of Materials Chemistry. A, Materials for energy and sustainability

ER -

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

Abstract

Keywords

UN SDGs

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