| 초록 |
Mesoporous silica materials with high surface area and uniform nanopores adsorption. In this work, we synthesized mesoporous silica, SBA-15 via sol-gel process and self-assembly process using tetraethyl orthosilicate (TEOS) as silica surface and triblock copolymer (P123) as structure-directing agent. The SBA-15 have surface area of 1,238 m2g+, pore size of 54.3Å and pore volume of 1.68 cm2g+. SBA-15 has typical 2D-hexagonal mesostructure with p6mm symmetry. The SBA-15 was functionalized with phosphate derivatives by chemical reaction with silanol groups, on the mesopore surface. After modification, the well-retained mesostructure was confirmed by powder X-ray diffraction (XRD), nitrogen sorption behavior (BET) and transmission electron microscopy (TEM). The functional groups were confirmed by X-ray photoelectron spectroscopy (XPS) and solid-state NMR. Finally, the functionalized SBA-15 was tested for adsorption of strontium metal ion in aqueous solution. |
