以鞍山铁尾矿为硅源,CTAB为模板剂,采用水热合成法合成出全硅介孔分子筛MCM-41。采用X射线衍射分析研究了pH值、CTAB与SiO2配比、晶化温度和晶化时间对MCM-41结构的影响,结果表明MCM-41的合成条件为n（CTAB）/n（SiO2）=0.05～0.60,pH值=8～11,晶化时间〉24h,晶化温度60～100℃。TEM可观察到样品具有典型的按六方对称性排列的孔道结构,孔径在2～4nm变化。FT-IR证明了分子筛具有硅氧四面体骨架。
Using the iron ore tailings as the silica source and n-hexadecyltrimethyl ammonium bromide（CTAB） as the template,highly ordered mesoporous molecular sieves MCM-41 were successfully synthesized by hydrothermal synthesis.The technique of X-ray diffraction was used to identify the effects of the systhesis pH,CTAB/SiO2,crystallization time and crystallization temperature on the crystal structure of MCM-41.The results showed that the synthesis conditions for getting suitable mesoporous molecular sieves MCM-41 were CTAB/SiO2 of 0.05-0.60,pH of 8-11,minimum crystallization time of 24h and crystallization temperature 60-100℃.The pore structure of MCM-41 was well-ordered and symmetrical hexagonal structure,which pore diameter of MCM-41 was changed between 2 to 4nm.Silicon-oxygen tetrahedron skeletons were confirmed by FT-IR.
参考文献
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