Adsorption of octylamine on titanium dioxide

• Published in: Applied surface science Vol. 255; no. 16; pp. 7337 - 7342
• Main Authors: Siwińska, Daria, Kołodziejczak-Radzimska, Agnieszka, Krysztafkiewicz, Andrzej, Jesionowski, Teofil
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 30.05.2009; Elsevier
• Subjects: Adsorption and desorption; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Octylamine; Physics; TiO 2 dispersive and adsorptive characteristics; Titanium dioxide (E 171); Adsorption and desorption; Octylamine; Titanium dioxide (E 171); TiO 2 dispersive and adsorptive characteristics; Inorganic compounds; Transition element compounds; Desorption; TiO; Titanium oxide; dispersive and adsorptive characteristics
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2009.03.093

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 TiO 2 in the production of pharmaceuticals.