FTIR internal reflection spectroscopy studies of the effect of pH on adsorption of oleate/oleic acid at the surface of a TiO < inf> 2 thin film deposited on a Ge single crystal
Document Type
Article
Publication Date
2-1998
Department
Department of Materials Science and Engineering
Abstract
The adsorption of oleate/oleic acid from aqueous solutions at the surface of titanium dioxide was examined by Fourier transform infrared (FT-IR) spectroscopy using a germanium internal reflection element coated with a thin film of TiO 2 . This thin film, with a thickness of 100-200 Å, was deposited on the surface of a germanium single crystal by rf/dc magnetron reactive sputtering. It was found that significant adsorption of oleate/oleic acid from a 0.03 mM aqueous solution occurs at neutral and close-to-neutral pH, from about pH = 4.5 to pH = 8.5. The surface density vs. pH relationship obtained in this study is consistent with literature reports on the effect of pH on flotation recovery of rutile from oleic acid solutions.
Publication Title
Applied Surface Science
Recommended Citation
Drelich, J.,
Lu, Y.,
Chen, L.,
Miller, J.,
&
Guruswamy, S.
(1998).
FTIR internal reflection spectroscopy studies of the effect of pH on adsorption of oleate/oleic acid at the surface of a TiO < inf> 2 thin film deposited on a Ge single crystal.
Applied Surface Science,
125(2), 236-244.
http://doi.org/10.1016/S0169-4332(97)00416-9
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/7449