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采用两步法将不同尺寸的silicalite-1分子筛纳米晶种通过自组装合成了一系列有序介孔silicalite-1分子筛.首先将强碱性的silicalite-1前驱体分别加热不同时间得到纳米晶种,然后在类似合成SBA-15的强酸性条件下组装成有序的介孔材料.合成条件的剧烈变化阻止了分子筛晶种的继续长大,并在三嵌段共聚物模板的诱导下组装成有序介孔材料.这种“自下而上”的方法制备有序介孔分子筛同时包含微孔和介孔.氮气吸脱附结果表明所制备的介孔分子筛材料均表现了很大的比表面积(730 m2/g以上).
A series of ordered mesoporous silicalite-1 zeolites were synthesized by a self-assembly method using a two-step method. First, the strongly basic silicalite-1 precursors were heated at different times to obtain nanocrystalline , And then assembled into ordered mesoporous materials under strongly acidic conditions similar to the synthesis of SBA-15. The dramatic changes in synthesis conditions prevented the continued growth of the molecular sieve seeds and were assembled under the induction of a triblock copolymer template Orderly mesoporous materials. This “bottom-up” method to prepare ordered mesoporous molecular sieves containing both micropores and mesopores. The results of nitrogen adsorption and desorption indicate that the prepared mesoporous molecular sieve materials all showed a large The specific surface area (730 m2 / g or more).