摘要:以正硅酸乙酯（TEOS）为硅源、十六烷基三甲基溴化铵（CTAB） 为模板剂，在酸性溶液的条件下，利用模板剂与硅源水解后生成的聚集 体之间相互作用，通过分子自组装，萃取除去模板剂而形成蠕虫状的介 孔 SiO₂ 材料。采用 TEM、XRD、N₂ 吸附 / 脱附和 FT — R 等测试手段对 产物进行了表征。结果表明，合成的介孔固体材料为无定型氧化硅，与 煅烧法相比，该介孔固体的孔径较大（7 nm以上）、孔壁较厚、孔径分 布较窄、BET表面积较大（可达1 200 m²/g）。 

关键词：模板法制备；介孔二氧化硅；分子自组装

Abstract:By using tetraethyl ortho-silicate (TEOS) as silica source and cetyl trimethyl ammonium bromide (C16TMABr) as the template, silica is synthe sized in acidic medium. The worm-like mesopores relies on the self-assembly of the surfactants aggregates and the interaction between the inorganic precursors, followed by extraction with ethanol to remove the template molecules. The worm-like mesoporous materials are synthesized with the reagents mentioned above and characterized with TEM, X-ray diffraction, nitrogen adsorption/ desorption and FT—IR techniques, etc. The results show that all the samples are amorphous. The samples have uniform mesoporous distribution and high surface areas; and they have larger pore diameter and thicker mesoporous silica wall than samples’ through calcinations under resembled conditions. 

Keywords: template synthesis; mesoporous silica;self-assembly