Mn0.6Fe2.4O4 was synthesized by the co-precipitation method. A simple method was developed for preparing Mn0.6Fe2.4O4@SiO2 nanocomposite via few steps. X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) images, BET surface area measurements were used to characterize the physical structures of the investigated samples. The crystallite size of the nanocomposite is greater than that of the parent sample. The dielectric constant (e/) of the Mn0.6Fe2.4O4 is greater than that of the sample Mn0.6Fe2.4O4@SiO2. The investigated samples have a semiconductor-like behavior with two different conduction mechanisms. M-H loops of the samples show ferrimagnetic properties. Mesoporous silica increased the coercive field and decreases the values of both Ms and Mr of Mn0.6Fe2.4O4. Mn0.6Fe2.4O4@SiO2 nanocomposite exhibits higher removal efficiency than Mn0.6Fe2.4O3. The maximum removal of the heavy metals is observed for Pb2+ and Cr6+.

中文翻译：

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介孔二氧化硅增强掺锰磁铁矿的工艺应用

Mn0.6Fe2.4O4采用共沉淀法合成。开发了一种通过几个步骤制备Mn0.6Fe2.4O4@SiO2纳米复合材料的简单方法。X 射线衍射 (XRD)、场发射扫描电子显微镜 (FESEM) 图像、BET 表面积测量用于表征所研究样品的物理结构。纳米复合材料的晶粒尺寸大于母体样品的晶粒尺寸。Mn0.6Fe2.4O4 的介电常数 (e/) 大于样品 Mn0.6Fe2.4O4@SiO2 的介电常数。研究的样品具有类似半导体的行为，具有两种不同的传导机制。样品的 MH 环显示亚铁磁性。介孔二氧化硅增加了矫顽力并降低了Mn0.6Fe2.4O4 的Ms 和Mr 值。Mn0.6Fe2。4O4@SiO2纳米复合材料的去除效率高于Mn0.6Fe2.4O3。观察到 Pb2+ 和 Cr6+ 的重金属去除率最高。