摘要
借助水热法,在表面活性剂和正硅酸乙酯混合过程中引入超声波作用,通过陈化、晶化及随后的煅烧,制备了SBA-15介孔微球.利用X-射线粉末衍射、傅里叶红外、扫描电镜、氮气吸附-脱附及高分辨透射电镜对样品进行了系统地分析.测试结果表明,制备的材料具有高度有序的二维六角介孔结构,平均粒径5μm、颗粒分散较好的介孔微球,球产率达到97%.微球的最可机孔径为6 nm,且比表面积为626 m2/g.
SBA-15 microspheres can be synthesized through introducing ultrasonic into the synthetic system in the process of mixing nonionic surfactant with organic silica source. A large series of characterization results （XRD, FT-IR, SEM, nitrogen adsorption-desorption analysis, DSG-TG and TEM） have demonstrated that the materials prepared possess the highly ordered two-dimensional hexagonal mesoporous structure. Fabricated samples show well-dispersed microspheres with 5 μm in an averaged diameter, with pore size about 6 nm and Barrett-Emmett-Teller （BET） surface area about 626 m2/g. And the yield of microspheres reaches above 97 %. These microspheres are premising for the industrial application.
出处
《重庆工学院学报（自然科学版）》
2008年第11期57-61,共5页
Journal of Chongqing Institute of Technology
基金
重庆市教委基金资助项目(KJ080601)
重庆工学院科研启动基金资助项目(2007ED15)
关键词
SBA-15
微球
超声波
表征
SBA-15
microspheres
ultrasonic
characterization
