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Sorption of Uranyl Ions on Titanium Oxide Studied by ATR-IR Spectroscopy

Sorption of Uranyl Ions on Titanium Oxide Studied by ATR-IR Spectroscopy

G Lefèvre, J Kneppers, M Fédoroff

J Colloid Interface Sci. 2008 Nov 1;327(1):15-20.

PMID: 18760420

Abstract:

ATR-IR spectroscopy was used to study the sorption of uranyl ions (10(-4) M) onto titanium oxide (mixture of rutile and anatase). A circulation setup, filled with a solution in D(2)O, allowed recording of the evolution of the antisymmetric O=U=O stretching of uranyl species onto titanium oxide particles deposited on the ATR crystal. The band centered at 915 cm(-1) has been decomposed in two Gaussian peaks at 920 and 905 cm(-1). From these values, and the observation that the ratio of the areas of the two peaks vs pH was constant, we have proposed that uranyl sorption on titanium oxide in the pH range 4-7 leads to the formation of one surface complex where uranium atoms have two different chemical environments. A trimer surface complex linked by two uranium atoms to the titanium oxide surface would be consistent with this interpretation.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP13463677-A	Titanium(IV) oxide, mixture of rutile and anatase		13463-67-7	Price

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