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Issue 1, 2017
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Instantaneous formation of polyoxometalate-based cerium vanadium oxide gels

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Abstract

The instantaneous formation of mechanically stable cerium vanadium oxide gels starting from soluble polyoxovanadates is reported together with initial application studies. Upon addition of phosphoric acid to solutions containing a vanadium oxide source (e.g. (nBu4N)4[V4O12]) and Ce3+, instantaneous formation (reaction time <1 s) of a vanadium oxide gel is observed. The gel shows unique mechanical and thermal stabilities (up to ∼180 °C). High permeability of the gel is observed, allowing its use for long-term acid delivery into aqueous media or for the adsorption of organic aromatic dye pollutants from solution. A range of spectroscopy and electron microscopy techniques provide insight into the gel formation and the gel composition: an intertwined 3D matrix of nanowires (d ∼ 10 nm) containing cerium, vanadium oxide and phosphate is identified as an inorganic matrix which enables the formation of the mechanically stable gel.

Graphical abstract: Instantaneous formation of polyoxometalate-based cerium vanadium oxide gels

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Publication details

The article was received on 27 Oct 2016, accepted on 24 Nov 2016 and first published on 25 Nov 2016


Article type: Research Article
DOI: 10.1039/C6QI00457A
Citation: Inorg. Chem. Front., 2017,4, 160-164
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    Instantaneous formation of polyoxometalate-based cerium vanadium oxide gels

    A. Seliverstov, M. Rangus, M. Hartmann, S. G. Mitchell and C. Streb, Inorg. Chem. Front., 2017, 4, 160
    DOI: 10.1039/C6QI00457A

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