ORGANIC-ACID ADSORPTION ON LEAD TITANATE SURFACES

Several carboxylic acids were adsorbed on the surface of lead titanate . The total amount of adsorbed acid was determined and characterized b y diffuse reflectance infrared Fourier transmission spectroscopy (DRIF TS). The acids were found to be chemisorbed on the lead titanate surfa ce by a metal carboxylate bond. This bond forms by reaction between su rface hydroxyls and the organic acid functional group. The amount of a dsorbed species per unit surface area varied with each carboxylic acid studied and generally correlated with the size of the individual mole cules. The experiments also demonstrate an application of a sensitive method for carbon analysis, oxygen-based coulombic titration.