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The mechanism of retention of vanadium oxo-species at the “titanium oxide / aqueous solution" interface

  • Authors (legacy)
    Tella E., Panagiotou G.D., Petsi T., Bourikas K., Kordulis C., and Lycourghiotis A.
DOI
https://doi.org/10.30955/gnj.000736
Abstract

The mechanism of retention of vanadium oxo-species at the “titanium oxide/aqueous solution”
interface was investigated over a wide pH range (4-9) and V(V) solution concentration (10-5-2×10-2 M)
by combining equilibrium deposition experiments, potentiometric titrations, microelectrophoresis and
“proton–ion” titration curves. It was inferred that the adsorbed V(V) oxo-species are retained inside
the compact layer of the interface through hydrogen/coordinative bonds forming very probably innersphere
complexes with the titania surface groups.

Keywords
titania vanadates interface Adsorption innersphere surface complex equilibrium deposition filtration aqueous solution hydrogen bonds pzc iep
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