Kd. Dobson et Aj. Mcquillan, In situ infrared spectroscopic analysis of the adsorption of aliphatic carboxylic acids to TiO2, ZrO2, Al2O3, and Ta2O5 from aqueous solutions, SPECT ACT A, 55(7-8), 1999, pp. 1395-1405
Citations number
34
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
The adsorption of a range of aliphatic mono- and di-carboxylic acids to met
al oxides has been investigated using in situ attenuated total reflectance
infrared spectroscopy. Thin films of TiO2, ZrO2, Al2O3, and Ta2O5 were prep
ared by evaporation the aqueous colloid oxides on single reflection ZnSe pr
isms. Formic and acetic acids were found to bind to ZrO2 and Ta2O5, but sho
wed no adsorption to TiO2 and Al2O3. The dicarboxylic acids, oxalic, maloni
c, succinic, adipic, maleic, and fumaric acids, were found to adsorb to eac
h of the metal oxide substrates. Oxalic and malonic acids were coordinated
via ester linkages involving both carboxylate groups. The longer chain dica
rboxylic acids coordinated via bridging bidentate interactions through each
carboxylate group. (C) 1999 Elsevier Science B.V. All rights reserved.