Abstract

The magnetic and sorption properties of CoFe₂O₄ and SiO₂ nanocomposites were studied. Composite samples were prepared by precipitation and impregnation using silica of plant or mineral origin. X-ray powder diffraction and IR spectroscopy showed that the composites comprise both amorphous SiO₂ and 5.3–59.2% CoFe₂O₄. The sorptive capacity for methylene blue (8.8–26.7 mg/g) was higher than that of the precursor SiO₂. All composites studied were ferromagnetic at room temperature. Their saturation magnetizations increased from 1.2 to 29.0 emu/g as the cobalt ferrite concentration in them increased.

中文翻译：

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磁活性复合吸附剂CoFe 2 O 4 –SiO 2

摘要

研究了CoFe ₂ O ₄和SiO ₂纳米复合材料的磁性和吸附性能。通过使用植物或矿物来源的二氧化硅沉淀和浸渍来制备复合材料样品。X射线粉末衍射和红外光谱表明，该复合材料同时包含非晶SiO ₂和5.3-59.2％CoFe ₂ O ₄。对亚甲蓝的吸附能力（8.8-26.7 mg / g）高于前体SiO ₂的吸附能力。所有研究的复合材料在室温下都是铁磁性的。随着它们中钴铁氧体浓度的增加，它们的饱和磁化强度从1.2增加到29.0 emu / g。