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2 article(s) from Naumann, Meike

Template-directed synthesis and characterization of microstructured ceramic Ce/ZrO₂@SiO₂ composite tubes

Jörg J. Schneider and
Meike Naumann

Beilstein J. Nanotechnol. 2014, 5, 1152–1159, doi:10.3762/bjnano.5.126

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Figure 1: a) SEM image of electrospun PS template fibers; b) and c) SEM at two different magnifications of mi...

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Figure 2: a), b): SEM images of the final ternary ceramic oxide composite tubes CeO₂/ZrO₂@SiO₂, obtained at 7...

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Scheme 1: Reaction sequence starting from an electrospinning process yielding PS fibers, followed by the subs...

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Figure 3: TEM images displaying the particulate character of the ternary oxide microtubes obtained after calc...

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Figure 4: PXRD spectrum of oxidic microtubes of the composition Ce_0.13Zr_0.87O₂@SiO₂. Main diffraction peaks 2...

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Figure 5: Raman spectrum of oxidic microtubes of composition Ce_0.13Zr_0.87O₂@SiO₂ displaying resonance signals...

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Figure 6: EFTEM, element mapping of calcined ternary oxide CeO₂/ZrO₂@SiO₂ microtubes. a) TEM overview of the ...

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Figure 7: HAADF-STEM image of a line scan of a length of 200 nm . The red artificial marking line indicates t...

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Figure 8: a–d) EFTEM, individual EDX profiles for the elements Si, O, Zr and Ce.

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Full Research Paper

Published 25 Jul 2014

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Template-assisted formation of microsized nanocrystalline CeO₂ tubes and their catalytic performance in the carboxylation of methanol

Jörg J. Schneider,
Meike Naumann,
Christian Schäfer,
Armin Brandner,
Heiko J. Hofmann and
Peter Claus

Beilstein J. Nanotechnol. 2011, 2, 776–784, doi:10.3762/bjnano.2.86

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Figure 1: Scanning electron micrographs (SEM) of electrospun PMMA fibres, fabricated from a 15 wt % solution ...

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Scheme 1: Schematic representation of the exotemplating process for the preparation of CeO₂ fibre mats with a...

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Figure 2: SEM image of the macrosized ceria mats, composed of ceria microtubes obtained by plasma treatment a...

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Figure 3: TEM and high-resolution TEM images of agglomerated nanosized ceria particles, which are the buildin...

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Figure 4: X-ray diffraction (XRD) pattern of nanostructured ceria.

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Scheme 2: Schematic representation of the exotemplating process for the preparation of CeO₂ fibremats by usin...

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Figure 5: SEM image of the final ceria mats, obtained by plasma treatment and further calcination at 350 °C, ...

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Figure 6: SEM images (different magnifications) of interconnected microsized ceria tubes. Samples were fabric...

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Figure 7: TEM (left) and HRTEM (right) images of nanostructured ceria thin film interconnecting the ceria tub...

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Figure 8: XRD spectra of nanostructured ceria (obtained with addition of Pluronic P123^® to the sol).

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Figure 9: TGA measurements of bare PMMA fibres (PMMA, solid line), a PMMA/sol without Pluronic P123^® (PMMA/so...

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Figure 10: PL spectrum of microsized ceria tubes composed of nanostructured ceria (obtained with addition of P...

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Figure 11: XRD spectra of the ceria reference sample (15 nm diameter) prepared by the standard oxalate-gel met...

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Figure 12: Comparison of the overall yield (Y) of nano/microsized ceria nanotubes (samples 1,2,3) versus nanos...

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Full Research Paper

Published 30 Nov 2011

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Template-directed synthesis and characterization of microstructured ceramic Ce/ZrO2@SiO2 composite tubes

Template-assisted formation of microsized nanocrystalline CeO2 tubes and their catalytic performance in the carboxylation of methanol

Template-directed synthesis and characterization of microstructured ceramic Ce/ZrO₂@SiO₂ composite tubes

Template-assisted formation of microsized nanocrystalline CeO₂ tubes and their catalytic performance in the carboxylation of methanol