| dc.description.abstract | The well-ordered cubic large-pore mesoporous silicas SBA-16 (Im3m) were successfully synthesized via co-condensation under acidic conditions using Pluronic F127 and Pluronic P123 as template.
One is carboxylic acid functionalized, synthesized by co-condensation of two different silane precursors, that is, tetraethyl orthosilicate (TEOS) and carboxyethylsilanetriol sodium salt (CES), under acidic condition using F127 and P123 as template. The maximum loading of CES contents into the pore wall without degrading the Im3m mesostucture was up to 40%. These materials were denoted as LP-S16C-x, where x is the mole ratio of carboxylic acid groups. The other is synthesized by co-condensation of tetraethyl orthosilicate (TEOS) and 3-aminopropyl)triethoxysilane (APTES) under same condiction like LP-S16C-x, and is called LP-S16N.
In this study, the synthesized materials were characterized by powder X-ray diffraction(XRD), nitrogen sorption measurement, thermogravimetric analysis (TGA), 13C CP-MAS NMR, 29Si MAS NMR, fourier transform infrared spectrometer (FTIR), transmission electron microscopy (TEM), scanning electron microscopy (SEM).
In adsorption experiment, the prepared carboxylic acid and amine functionalized cubic mesoporous silicas were used as suitable adsorbents for protein adsorption (bovin serum albumin and hemoglobin). The adsorption processes were carefully studied with differernt factors. The prepared adsorbents showed an excellent adsorption capacity due to well-ordered pore structures. The isotherm models and kinetic models properties were analyzed to describe the adsorption behavior of the prepared materials. Moreover, We studied the selectively protein adsorption of bovin serum albumin, hemoglobin, and lysozyme for a range of different pH values. | en_US |