實驗室過去已經發展出一套奈米silicalite-1的合成方法，可快速製作出尺寸50~60 nm粒子、且均一分佈的奈米沸石。 本研究是以過去的方法為基礎並改變不同反應條件，製作出兩種不同形貌的沸石且尺寸與過去相近。為了探討不同結構的反應機制，將不同條件下製作出的產物進行分析。主要分析部份為離心上下層產率、表面形態(SEM、TEM)、表面官能基(FTIR)、結晶性及晶體結構(XRD)、比表面積孔徑分佈(ASAP)、粒徑分佈(DLS)等。 鍛燒後，兩種不同形貌沸石的再分散性也有明顯差異。在鹼性溶液下，單晶粒子較複合結晶粒子有分散性(PDI<0.1)。並且粒子經過MPS表面改質可分散至MEK，未來將有機會混入高分子，製作出低折率材料。 利用稀釋前驅濃膠到不同醇類中，合成出不同形貌的粒子。另外，改變不同低溫反應時間，也可得到不同尺寸的沸石粒子。 A rapid synthesis procedure for silicalite-1 nanocrystals was developed in our laboratory in the past. The crystal sizes about 50 nm are uniform. In the study, the previous synthesis procedure were modified to produce silicalite-1 nanocrystals with similar size but different morphologies. To study the growth mechanisms of nanocrystals in different morphologies, the products were analyzed with FTIR, SEM, TEM, ASAP and centrifuged yield . After calcination, the dispersion is different for well-shaped and agglomerated nanocrystals. The well-shaped nanocrystals were dispersed much better in alkaline solution after calcination than agglomerated nanocrystals and the dispersed particles were uniform(PDI<0.1). The well-shaped nanocrystals dispersed in MEK by surface modification with MPS. It might be applied in hybrid materials. The particles in different morphologies can be synthesized by diluting precussor in alcohols. In addition, the different size particles were obtained by different aging time.
