"Dirty nanostructures" : aerosol-assisted synthesis of temperature stable mesoporous metal oxide semiconductor spheres comprising hierarchically assembled zinc oxide nanocrystals controlled via impurities

Lehr, Daniela; Großmann, Dennis; Grünert, Wolfgang; Polarz, Sebastian

"Dirty nanostructures" : aerosol-assisted synthesis of temperature stable mesoporous metal oxide semiconductor spheres comprising hierarchically assembled zinc oxide nanocrystals controlled via impurities

Dateien

Lehr_276408.pdfGröße: 366.9 KBDownloads: 746

Datum

2014

Autor:innen

Lehr, Daniela

Großmann, Dennis

Grünert, Wolfgang

Polarz, Sebastian

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Chemie

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Nanoscale. 2014, 6(3), pp. 1698-1706. ISSN 2040-3364. eISSN 2040-3372. Available under: doi: 10.1039/C3NR05007F

Zusammenfassung

Structural disintegration or the loss of accessible surfaces of functional nanostructures due to processes involving mass transport (e.g. sintering) is a serious problem for any application of these materials at elevated temperatures, like in heterogeneous catalysis or chemical sensing. Phases with low sintering temperatures, e.g. some metals or metal oxides like zinc oxide (ZnO), are very sensitive in this respect. Therefore, it is not only relevant to prepare important materials with refined morphologies, but the desired features need to be stable under real conditions. In this study, we describe the preparation of mesoporous ZnO nano-/microspheres by means of a template-assisted aerosol technique. Furthermore, by intentional introduction of impurity elements as dopants, specific surface areas and porosities of the prepared materials can be increased significantly. The impurities also strongly improve the thermal stability of the described ZnO nanostructures against thermal sintering. Although the pure ZnO material suffers from a complete loss of porosity, the structures of the impure (”dirty”) materials change only negligibly. Even at 500 °C morphology and porosity are preserved. The latter advantageous property was used for testing the novel nanocatalysts in heterogeneous catalysis.

Fachgebiet (DDC)

540 Chemie

Zitieren

ISO 690

LEHR, Daniela, Dennis GROSSMANN, Wolfgang GRÜNERT, Sebastian POLARZ, 2014. "Dirty nanostructures" : aerosol-assisted synthesis of temperature stable mesoporous metal oxide semiconductor spheres comprising hierarchically assembled zinc oxide nanocrystals controlled via impurities. In: Nanoscale. 2014, 6(3), pp. 1698-1706. ISSN 2040-3364. eISSN 2040-3372. Available under: doi: 10.1039/C3NR05007F

BibTex

@article{Lehr2014Dirty-27640,
  year={2014},
  doi={10.1039/C3NR05007F},
  title={"Dirty nanostructures" : aerosol-assisted synthesis of temperature stable mesoporous metal oxide semiconductor spheres comprising hierarchically assembled zinc oxide nanocrystals controlled via impurities},
  number={3},
  volume={6},
  issn={2040-3364},
  journal={Nanoscale},
  pages={1698--1706},
  author={Lehr, Daniela and Großmann, Dennis and Grünert, Wolfgang and Polarz, Sebastian}
}

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