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  • Title: Effect of surface area enhancement on the adsorption of Bovine Serum Albumin onto titanium dioxide.
    Author: Kopac T, Bozgeyik K.
    Journal: Colloids Surf B Biointerfaces; 2010 Mar 01; 76(1):265-71. PubMed ID: 20005083.
    Abstract:
    The equilibrium and the kinetics of BSA adsorption onto specific surface area changed TiO(2) by heat treatment were studied. The TiO(2) was treated at 100 and 200 degrees C for 24h. The specific surface areas of TiO(2) characterized by BET method were measured as 48.9m(2)/g and 53.0m(2)/g for 100 and 200 degrees C, respectively. The adsorption rate and the equilibrium experiments were carried out at pH 4 for 40 degrees C. The rate kinetics for the adsorption of BSA was best fitted with the pseudo-first-order kinetic model. The equilibrium process was described by the Langmuir and Freundlich isotherm models. The adsorption capacities (Q(0)) calculated from the Langmuir isotherm model were 40.6 and 44.4mg/g for heat-treated TiO(2) at 100 and 200 degrees C, respectively. The adsorption of BSA increased with increasing surface area of TiO(2). The zeta potential values of the 100- and 200 degrees C-treated TiO(2) were found as -2.57mV and 0.39mV, respectively, showing that the interaction between TiO(2) with BSA increased with increasing temperature of heat treatment for TiO(2).
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