Open AccessThe Adsorption of Sulphonate on Fluorite Single Crystals as Examined by in-situ FT-IR Internal Reflectance Spectroscopy
Author(s) -
Ahmed Yehia,
Asem A. Atia,
B. G. Ateya
Publication year - 1997
Publication title -
adsorption science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.682
H-Index - 36
eISSN - 2048-4038
pISSN - 0263-6174
DOI - 10.1177/026361749701500905
Subject(s) - fluorite , chemistry , adsorption , infrared spectroscopy , diffuse reflectance infrared fourier transform , attenuated total reflection , reflection (computer programming) , spectroscopy , single crystal , total internal reflection , analytical chemistry (journal) , kinetics , crystallography , chromatography , catalysis , organic chemistry , optics , photocatalysis , physics , quantum mechanics , computer science , programming language
The adsorption densities of dioctyl sodium sulphosuccinate (AOT) at the surface of a fluorite single crystal were calculated from in situ FT-IR internal reflection spectroscopic data. The results were analyzed according to the modified Frumkin isotherm in order to evaluate the lateral interaction coefficient, a, and the adsorption free energy change, ΔG θ 0 . The adsorption kinetics of AOT at a fluorite internal reflection element (IRE) were studied. In addition, by monitoring the –CH 2 adsorption band using polarized light, it was possible to investigate the orientation of the adsorbed species on the fluorite IRE surface.