Recent research has demonstrated a new synthesis route for hierarchically porous zeolite composites by mechanical modification of the support surface using ultrasonication in a nanoparticle suspension. It was believed that target zeolites should be added as seeds for the sonication. In this study, the effect of nanoparticles was investigated with ultrasonication to understand the crystallization mechanism of zeolites obtained by the nanoparticles–assisted synthesis. It has been found that the nanoparticles under the influence of ultrasonication generate fissures or cracks as nucleation sites on the carbon surface. These nanoparticles such as zeolite A, γ-Al₂O₃, quartz and sand are different from the target zeolite X. Therefore, an amorphous aluminosilicate gel nucleates at those cracks during the hydrothermal treatment. Thus, the mechanical activation of the support surface is the process to induce the formation of strongly attached zeolite X over the template, not a seeding step. This is confirmed as an attachment due to the weak bond between the support and the zeolite for ‘non-seeded’ composites whereas the ‘seeded’ composites have a robust structure which maintains a zeolite coating upon mechanical agitation.

最近的研究表明，通过使用纳米粒子悬浮液中的超声处理对载体表面进行机械改性，可以为分层多孔沸石复合材料提供一种新的合成途径。据认为，应加入目标沸石作为超声处理的种子。在这项研究中，通过超声处理研究了纳米粒子的作用，以了解通过纳米粒子辅助合成获得的沸石的结晶机理。已经发现，在超声作用下的纳米颗粒在碳表面上作为成核位点产生裂缝或裂纹。这些纳米颗粒如沸石A，在γ-Al ₂ ö ₃，石英和沙与目标沸石X不同。因此，在水热处理期间，无定形硅铝酸盐凝胶在这些裂纹处成核。因此，支撑表面的机械活化是诱导在模板上形成牢固附着的沸石X的过程，而不是播种步骤。由于“非种子”复合材料的载体和沸石之间的弱结合，这被确认为附着物，而“种子”复合材料则具有坚固的结构，可在机械搅拌下保持沸石涂层。