Jump to main content
Jump to site search

Issue 2, 2013
Previous Article Next Article

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

Author affiliations

Abstract

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.

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

Back to tab navigation

Supplementary files

Publication details

The article was received on 03 Sep 2012, accepted on 15 Oct 2012 and first published on 17 Oct 2012


Article type: Paper
DOI: 10.1039/C2TA00169A
Citation: J. Mater. Chem. A, 2013,1, 381-387

  •   Request permissions

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

    M. Schieder, T. Lunkenbein, T. Martin, W. Milius, G. Auffermann and J. Breu, J. Mater. Chem. A, 2013, 1, 381
    DOI: 10.1039/C2TA00169A

Search articles by author

Spotlight

Advertisements