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采用蒙脱石作为硅铝源前驱体,在矿物表面硅源和溶液硅源的共同作用下,在活化蒙脱石表面原位合成了高热稳定性Al-MCM-41。利用矿物表面硅源使得合成所用模板剂用量降低,合成产物的热稳定性较高,溶液硅源与表面硅源共同作用在模板剂上,聚合、沉淀得到长程结构较好的Al-MCM-41。本文对合成样品的XRD、比表面积、热稳定性、电子显微镜等进行了测试,对模板剂用量、NaOH的浓度和活化时间等进行了讨论。合成产物的热稳定性高,在800℃煅烧2h后仍具有很高的比表面积,达800m~2/g在1200℃煅烧2h后仍具有较高的比表面积,达100m~2/g以上。
Montmorillonite was used as precursor of Si / Al source. Al-MCM-41 with high thermal stability was synthesized in situ on the surface of activated montmorillonite under the combined action of mineral surface silicon source and solution silicon source. The use of mineral surface silicon source makes synthesis dosage of template used to reduce the thermal stability of the synthesized product is higher, the solution of silicon source and the surface of the silicon source acting on the template agent, polymerization, precipitation Al-MCM-41 good long-range structure . In this paper, XRD, specific surface area, thermal stability and electron microscopy of the synthesized samples were tested. The dosage of template, concentration of NaOH and activation time were discussed. The synthesized product has high thermal stability and high specific surface area after being calcined at 800 ℃ for 2h. After calcined at 1200 ℃ for 2h, it still has high specific surface area of more than 100m ~ 2 / g.