1 research outputs found
Nanoparticles of Low-Valence Vanadium Oxyhydroxides: Reaction Mechanisms and Polymorphism Control by Low-Temperature Aqueous Chemistry
An aqueous synthetic route at 95
°C is developed to reach selectively three scarcely reported
vanadium oxyhydroxides. Häggite V<sub>2</sub>O<sub>3</sub>(OH)<sub>2</sub>, Duttonite VO(OH)<sub>2</sub>, and Gain’s hydrate
V<sub>2</sub>O<sub>4</sub>(H<sub>2</sub>O)<sub>2</sub> are obtained
as nanowires, nanorods, and nanoribbons, with sizes 1 order of magnitude
smaller than previously reported. X-ray absorption spectroscopy provides
evidence that vanadium in these phases is V<sup>+IV</sup>. Combined
with FTIR, XRD, and electron microscopy, it yields the first insights
into formation mechanisms, especially for Häggite and Gain’s
hydrate. This study opens the way for further investigations of the
properties of novel V<sup>+IV</sup> (oxyhydr)oxides nanostructures