Adsorption of Inorganic Phosphates on a Titanium Dioxide Surface

It has been shown that the adsorption of inorganic phosphates, the molecules of which contain one to three phosphorus atoms, on the surface of nanocrystalline titanium dioxide may be interpreted as the formation of complexes of two types, i.e., outer-sphere electrostatic and inner-sphere covalent co...

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Bibliographic Details
Published in:Colloid journal of the Russian Academy of Sciences 2020-05, Vol.82 (3), p.245-253
Main Authors: Vlasova, N. N., Markitan, O. V.
Format: Article
Language:English
Subjects:
Adsorption
Chemistry
Chemistry and Materials Science
Coordination compounds
Phosphates
Polymer Sciences
Stability constants
Surface chemistry
Surfaces and Interfaces
Thin Films
Titanium
Titanium dioxide
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Summary:It has been shown that the adsorption of inorganic phosphates, the molecules of which contain one to three phosphorus atoms, on the surface of nanocrystalline titanium dioxide may be interpreted as the formation of complexes of two types, i.e., outer-sphere electrostatic and inner-sphere covalent complexes. The stability constants of the adsorption complexes of both types have been calculated from the experimental dependences of adsorption values on solution pH and ionic strength using the basic Stern model of surface complexation.
ISSN:1061-933X
1608-3067
DOI:10.1134/S1061933X2003014X