Fe₃O₄ micro-particles encapsulated within silica bearing an outer layer of ordered mesoporous mSiO₂-Fe (Fe₃O₄@SiO₂@mSiO₂-Fe) were synthesized. The material was a magnetically separable catalyst for the oxidative cracking reaction of styrene to produce benzaldehyde selectively, which was a very important transformation from the industrial viewpoint. Characterizations showed that this material was formed by a typical core-shell structure with uniform hexagonal mesopores possessed high specific surface area. The unique material structure facilitated the adsorption and mass transport of the organic molecules over its surface and enhanced the durability of the materials. Notably, the catalyst allowed the utilization of air as partial oxidant so that the reaction could employ reduced amount of H₂O₂, leading to an even safer process from large-scale application viewpoint.

包裹在二氧化硅中的Fe ₃ O ₄微粒，该二氧化硅带有外层有序介孔mSiO ₂ -Fe（Fe ₃ O ₄ @SiO ₂ @mSiO ₂-Fe）被合成。该材料是用于苯乙烯的氧化裂解反应以选择性地生产苯甲醛的磁性可分离催化剂，从工业角度来看，这是非常重要的转变。表征表明，该材料由典型的核-壳结构形成，具有均匀的六角形中孔，具有较高的比表面积。独特的材料结构促进了有机分子在其表面上的吸附和质量传输，并增强了材料的耐用性。值得注意的是，该催化剂允许利用空气作为部分氧化剂，使得该反应可以使用减少量的H ₂ O ₂，从大规模应用的观点来看，这导致甚至更安全的方法。