Nanocomposites of ordered mesoporous carbon with silica coated magnetite nanoparticles (Fe₃O₄@SiO₂-CMK-8, MNCs) were synthesized by carbonizing sucrose inside the pores of the Kit-6 mesoporous silica and used to remove Ponceau 4R from aqueous solutions. The synthesized adsorbent was characterized by Fourier Transform Infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), scanning electron microscope (SEM), and Transmission electron microscope (TEM). In order to survey the effective parameters on dye removal efficiency, the factorial design was applied. At the optimum conditions (pH: 2, adsorbent dosage: 0.1 g, contact time: 20 min and ionic strength: 0.05 mol L⁻¹), the evaluation of four isotherm models was carried out and isotherm data were matched well with Freundlich model (R² = 0.9988, n = 1.633). Kinetic studies showed that the adsorption of Ponceau 4R was better represented by the pseudo-second order kinetics (R² > 0.999). Finally, the obtained results of real samples showed that the Fe₃O₄@SiO₂-CMK-8 nanocomposite is an effective adsorbent for the rapid removal of Ponceau 4R from aqueous solutions.

通过将Kit-6介孔二氧化硅孔隙内部的蔗糖碳化，可以合成有序介孔碳与二氧化硅包覆的磁铁矿纳米粒子（Fe ₃ O ₄ @SiO ₂ -CMK-8，MNCs）的纳米复合材料，并用于从水溶液中去除Ponceau 4R。通过傅立叶变换红外（FT-IR）光谱，X射线衍射（XRD），扫描电子显微镜（SEM）和透射电子显微镜（TEM）对合成的吸附剂进行表征。为了调查有关染料去除效率的有效参数，采用了析因设计。在最佳条件下（pH：2，吸附剂量：0.1 g，接触时间：20分钟，离子强度：0.05 mol L ^-1），对四个等温线模型进行了评估，等温线数据与Freundlich模型非常匹配（R ²  = 0.9988，n  = 1.633）。动力学研究表明，伪二阶动力学更好地代表了丽春红4R的吸附（R ²  > 0.999）。最后，实际样品的获得结果表明，Fe ₃ O ₄ @SiO ₂ -CMK-8纳米复合材料是从水溶液中快速去除Ponceau 4R的有效吸附剂。