Synthesis and characterization of SBA-15 macrospheres with hierarchical pore structure

<正>The new macroscopic-scale SBA-15 spheres with diameter of 0.2-0.5 mm are prepared by a sol-gel method,in which the tetrabutylorthosilicate（TBOS） is used as silicon source and triblock copolymer（P123） and polyoxyethylene octylphenol ether（OP- 10） are used as templates.The resulting spherical samples are characterized by XRD,N2 adsorption-desorption,TEM and SEM methods.The results show that the inner structure of SBA-15 macrospheres has macroporous channels（0.5μm） and mesoporous skeleton（4-5 nm）.These SBA-15 macrospheres with the hierarchical pore structure demonstrate high absorption capacity for Emodin molecules.