The present work investigates the synthesis of iron-cobalt based nanocomposites supported on SBA-15 and shows a detailed study of their porosity and the photocatalytic activity in methylene blue degradation as a model dye. The textural characterization indicated the presence of interconnected pores after the impregnation process and insertion of Fe and Co on SBA-15. TEM images confirmed that the SBA-15 mesopores were partially filled by Fe and Co species after the addition of metals and an average particle size of 11 nm. The diffractograms revealed the formation of the Fe₂SiO₄ and CoFe₂O₄ phases for the O-SBA-15 sample (oxide supported on SBA-15) and the presence of the Fe₇Co₃ structure for the solid A-SBA-15 (alloy dispersed in mesoporous silica), indicating the phases that are partially blocking the mesopores. The photocatalysis results confirmed that the silica support is essential to optimize the photocatalytic activity of the Fe and Co species in the dye degradation, favoring the accessibility of active sites. The presence of the phase mixture, Fe₂SiO_4, and Fe₇Co₃, in OAM-SBA-15 (oxide and alloy supported on SBA-15) sample, favors the photocatalytic activity of methylene blue (MB) due to the synergistic effect between Fe²⁺ and Fe⁰. The degradation of the MB occur through a sequence of reactions both on the solid surface and on the solution.

本工作研究了负载在SBA-15上的铁钴基纳米复合材料的合成，并显示了其多孔性以及在作为模型染料的亚甲基蓝降解中的光催化活性的详细研究。织构表征表明，在浸渍过程以及在SBA-15上插入Fe和Co之后，互连孔的存在。TEM图像证实，在添加金属并且平均粒径为11nm之后，SBA-15中孔被Fe和Co物种部分填充。衍射图揭示了O-SBA-15样品（在SBA-15上负载的氧化物）的Fe ₂ SiO ₄和CoFe ₂ O ₄相的形成以及Fe ₇ Co ₃的存在。固体A-SBA-15（分散在中孔二氧化硅中的合金）的结构，表明部分阻塞了中孔的相。光催化结果证实，二氧化硅载体对于在染料降解中优化Fe和Co物种的光催化活性至关重要，有利于活性位点的可及性。OAM-SBA-15（氧化物和合金负载在SBA-15上）样品中相混合物Fe ₂ SiO ₄和Fe ₇ Co ₃的存在具有协同作用，有利于亚甲基蓝（MB）的光催化活性。 Fe ²⁺和Fe ⁰之间的作用。MB的降解通过固体表面和溶液上的一系列反应而发生。