Adsorption of octylamine on titanium dioxide |
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Authors: | Daria Siwińska |
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Institution: | Institute of Chemical Technology and Engineering, Poznan University of Technology, M. Sk?odowskiej-Curie 2 Sq., 60-965 Poznan, Poland |
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Abstract: | Processes of adsorption and desorption of a model active substance (octylamine) on the surface of unmodified titanium dioxide (E 171) have been performed. The effects of concentration of octylamine and time of the process on the character of adsorption have been studied and the efficiency of the adsorption/desorption has been determined. The samples obtained have been studied by X-ray diffraction. The nitrogen adsorption/desorption isotherms, particle size distribution and absorption capacities of water, dibutyl phthalate and paraffin oil have been determined. The efficiency of octylamine adsorption on the surface of the titanium dioxide has been found positively correlated with the concentration of octylamine in the initial solution. The desorption of octylamine has decreased with increasing concentration of this compound adsorbed. For octylamine in low concentrations the physical adsorption has been found to dominate, which is desirable when using TiO2 in the production of pharmaceuticals. |
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Keywords: | Titanium dioxide (E 171) Octylamine Adsorption and desorption TiO2 dispersive and adsorptive characteristics |
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