阳离子表面活性剂对silicalite-1沸石形貌的影响

Reverse micelle -mediated synthesis of silicalite-1 zeolites with different morphology

摘要:

对反胶束体系中silicalite-1沸石的合成进行了研究，得到了不同形貌的沸石产品。考察了表面活性剂含量、硅源等参数对合成silicalite-1沸石结晶度和形貌的影响。结果表明，在本实验研究范围内，正庚烷含量、表面活性剂/四丙基氢氧化铵比值及硅源对产品的结晶度和形貌影响较大，而NaOH含量对产品的影响不明显。通过调节合成参数，得到了球形、棺材状、六角状的silicalite-1沸石。

Abstract:

The synthesis and characterization of silicalite-1 made in reverse micelle at 433k are reported. Silicalite-1 materials formed in reverse micelle synthesis possessed different shapes compared to those formed by conventional methods. Syntheses were also performed to ascertain how the content of surfactant and heptane, silica source and NaOH content influence material properties. The current work showed that the morphology of the crystals obtained was highly sensitive to surfactant and heptane content and silica source, but insensitive to the NaOH content. Silicalite-1 materials that were coffin, hexagonal prismatic and rod shapes could be obtained in the present of reverse micelle.