ADSORPTION-KINETICS OF EGDN ON ZNO BY DIFFUSE REFLECTANCE INFRARED FOURIER-TRANSFORM SPECTROSCOPY

Diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) w as used to follow the adsorption kinetics of ethyleneglycol dinitrate (EGDN) on zinc oxide as a function of dosing time. Inhomogeneous broad ening of the NO2 antisymmetric stretching vibration was found to be do se dependent. Through nonlinear curve-fitting techniques, the sum of t hree component bands was found to reproduce the inhomogeneously broade ned envelope and was attributed to two different types of adsorbed EGD N corresponding to on-end and bridged sites on a zinc rich surface of zinc oxide. The adsorbed EGDN species were characterized by their line -shape parameters and adsorption kinetics.