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Hierarchically porous tungsten oxide nanotubes with crystalline walls made of the metastable orthorhombic polymorph

Title data

Schieder, Martin ; Lunkenbein, Thomas ; Martin, Thomas ; Milius, Wolfgang ; Auffermann, Gudrun ; Breu, Josef:
Hierarchically porous tungsten oxide nanotubes with crystalline walls made of the metastable orthorhombic polymorph.
In: Journal of Materials Chemistry A. Vol. 1 (2013) Issue 2 . - pp. 381-387.
ISSN 2050-7496
DOI: https://doi.org/10.1039/C2TA00169A

Abstract in another language

A simple route towards highly crystalline and hierarchically porous tungsten oxide nanotubes is presented. Interestingly, due to the limited wall thickness, the metastable orthorhombic high-temperature polymorph could be stabilized for the first time at room temperature without doping. In brief, ammonium metatungstate (AMT) is grafted over core-crosslinked poly(butadiene)-block-poly(2-vinylpyridine) (PB-b-P2VP) nanorods at pH 3. Coulomb interactions between protonated PB-b-P2VP nanorods (pKa 4.5) and metatungstate anions promote hybrid formation. Subsequent calcination of the PB-b-P2VP–AMT hybrid material at 490 °C results in a non-woven structure of hierarchically porous and crystalline, orthorhombic tungsten oxide nanotubes as confirmed by electron microscopy, X-ray diffraction, and nitrogen physisorption.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Anorganic Chemistry I > Chair Anorganic Chemistry I - Univ.-Prof. Dr. Josef Breu
Research Institutions > Collaborative Research Centers, Research Unit
Research Institutions > Collaborative Research Centers, Research Unit > SFB 840 Von partikulären Nanosystemen zur Mesotechnologie
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Anorganic Chemistry I
Research Institutions
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 20 Mar 2018 14:01
Last Modified: 20 Mar 2018 14:01
URI: https://eref.uni-bayreuth.de/id/eprint/9282