Silica aerogels have the potential use in many applications due to their large specific surface area and high porosity. One of these applications can be adsorption. However, their major disadvantage is their very low strength. Si-aerogels can be dispersed in adsorption processes with strong mechanical mixing and their removal from the solution environment becomes difficult but also their reuse becomes impossible. Therefore, mechanical strength of the adsorbent was increased with the sandwich structure synthesised in this study and it was aimed to prevent deformations during its use. In this study, a sandwich type structure with silica aerogels in the outer part and hollow silica microspheres in the inner part was synthesised. The sandwich structure was produced and characterised with a hybrid process in which production of aerogel from rice hull and hydrolysis-condensation method were used together with hollow silica microsphere production methods. The produced sandwich structure was used as an adsorbent in removing the dye material from aqueous solutions containing methylene blue (MB) dye. In the process of removing MB dye from aqueous solutions with silica aerogel-hollow silica microsphere sandwich (SAE-HS) structure, the maximum adsorption capacity was calculated as 35.94 mg/g. While it was concluded that the adsorption of MB dye with SAE-HS structure is highly dependent on pH, it was determined that there was an increase in the adsorption efficiency with the increase of pH. As a result, the sandwich structure showed a successful adsorbent property. Its high efficiency recovery was achieved. The sandwich structure has the potential to be developed as an adsorbent with a higher adsorption capacity.

二氧化硅气凝胶由于其大比表面积和高孔隙率而在许多应用中具有潜在用途。这些应用之一可以是吸附。然而，它们的主要缺点是强度非常低。Si-气凝胶可以通过强烈的机械混合分散在吸附过程中，并且将它们从溶液环境中去除变得困难，而且它们的再利用变得不可能。因此，本研究中合成的夹层结构增加了吸附剂的机械强度，目的是防止其在使用过程中变形。在这项研究中，合成了一种夹心型结构，外部为二氧化硅气凝胶，内部为空心二氧化硅微球。夹心结构的生产和表征采用混合工艺，其中从稻壳生产气凝胶和水解缩合法与空心二氧化硅微球生产方法相结合。产生的夹心结构用作从含有亚甲蓝 (MB) 染料的水溶液中去除染料材料的吸附剂。在从具有二氧化硅气凝胶-空心二氧化硅微球夹心（SAE-HS）结构的水溶液中去除MB染料的过程中，计算出最大吸附容量为35.94 mg/g。虽然得出的结论是具有 SAE-HS 结构的 MB 染料的吸附高度依赖于 pH 值，但确定吸附效率随着 pH 值的增加而增加。结果，夹心结构显示出成功的吸附性能。实现了高效回收。夹心结构有潜力发展成为具有更高吸附能力的吸附剂。