A facile method to fabricate monodispersed SBA-15 spheres
Micrometer-sized mesoporous silica SBA-15 spheres with good dispersivity were successfully synthesized by adding the soluble starch into the aqueous solution containing P123 and tetraethyl orthosilicate,based on the special function of water-soluble polymer in the sol-gel process.The obtained SBA-15 silica spheres were characterized by scanning electron microscopy,X-ray diffraction and N2 physisorption technique.The obtained SBA-15 spheres possessed pore size from 17.4 nm to 24.3 nm and the specific surface area from 565.3 m2 g-1 to 459.4 m2 g-1.Furthermore,the dispersibility of SBA-15 silica spheres was good.The results showed that appropriate amount of soluble starch improved the uniformity and dispersibility of silica spheres,while the structure and pore size of the obtained SBA-15 silica spheres with hexagonal symmetry created by P 123 remained unchanged.
Mesoporous SBA-15 spheres Monodisperse Soluble starch
Mingxia DU Maozhen Xu Wenzhi Li
College of Materials Science and Engineering,Liaocheng University,Liaocheng 252000,Shandong,China
国际会议
大理
英文
931-935
2011-08-18（万方平台首次上网日期，不代表论文的发表时间）