【作者】 刘玉萍； 王金桂； 周慧静； 陈铁红； 袁忠勇；

【Author】 LIU Yu-ping WANG Jin-gui ZHOU Hui-jing CHEN Tie-hong YUAN Zhong-yong (College of Chemistry,Nankai University,Tianjin 300071,China)

【机构】 南开大学化学学院；

【摘要】 考察了在合成体系中添加金属离子 Sn~2+对合成的 SBA-15分子筛性质和形貌的影响。实验发现,当反应物中 n(Si)/n(Sn~2+)为50:3时,合成的 SBA-15的 BET 比表面积可达到1125 m~2/g,同时呈现纤维束形貌。这可能与 Sn 和 Si 是同主族、性质相似有关。在静置条件下加入 Sn~2+,可合成出六边形片状单晶 SBA-15。金属离子 Sn~2+通过与聚合物 PEO 段之间的相互作用改变了嵌段共聚物胶束的聚集,从而对 SBA-15形貌产生影响。更多还原

【Abstract】 Mesoporous SBA-15 was synthesized in the presence of metal ion Sn²⁺.The effect of Sn²⁺on the properties and morphology of SBA-15 was investigated.When the Si/Sn²⁺molar ratio was 50:3,the prepared SBA-15 exhibited fiber-like morphology with high BET surface area of 1125 m²/g,suggesting that Sn²⁺had a distinct impact on the synthesis of SBA-15.This may be related to the similar properties for the same main-group elements Si and Sn.Under static condition and in the presence of Sn²⁺,SBA-15 with uniform morphology of hexagonal plate was obtained.PEO-Sn²⁺chelating interaction changed the aggregate behavior of the block copolymer micelles so as to affect the morphology of SBA-15.更多还原