کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1209054 | 1493766 | 2006 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Synthesis of ordered large pore SBA-15 spherical particles for adsorption of biomolecules Synthesis of ordered large pore SBA-15 spherical particles for adsorption of biomolecules](/preview/png/1209054.png)
The synthesis of spherical particles of mesoporous silicates (SBA-15) with mesopore diameter upto 127 Å, and particle diameter of 4–10 μm has been achieved. The SBA-15 spheres were obtained using pluronics P123 (EO20PO70EO20) as a surfactant coupled with cetyltrimethylammonium bromide (CTAB) as a co-surfactant. Ethanol played a very important role in the formation of silica spheres, as it delays the reaction rate of the SBA-15 synthesis. A wide range of pore diameters (28–127 Å) of these spherical SBA-15 materials with large surface area >700 m2/g has been synthesized. The effects of temperature, ethanol, CTAB and swelling agent have also been studied. The SBA-15 samples were characterized using small angle X-ray scattering (SAXS), N2 adsorption–desorption, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The spherical SBA-15 after mechanical grinding was used for protein adsorption, and adsorption capacity was compared with that of conventional fibrous SBA-15. The spherical SBA-15 particles with pore diameter of 127 Å have a very high capacity of 700 mg/g for lysozyme at pH 7.
Journal: Journal of Chromatography A - Volume 1122, Issues 1–2, 28 July 2006, Pages 13–20