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

Paper Topic: 
General
 
Volume: 
 
Issue: 
 

Pages :
231 - 238

Authors: 
Tella E., Panagiotou G.D., Petsi T., Bourikas K., Kordulis C., and Lycourghiotis A.
Paper ID: 
736
Paper Status: 
Published
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