Abstract

In this study we have investigated new magnetic nanocomposites (MNCs) graphene oxide (GrO)/magnetite (Fe₃O₄) + cobalt ferrite (CoFe₂O₄) of various concentrations that were synthesized by the mechanochemical method—the process of mechanical grinding in a ball mill in the aqueous medium of graphene oxide and preliminarily synthesized powders of magnetite and cobalt ferrite. We have obtained and studied MNCs GrO/Fe₃O₄ + CoFe₂O₄ obtained by grinding with various contents of components (in wt %), namely: 50/40 + 10; 50/25 + 25; 50/10 + 40; and 50/0 + 50. The synthesized MNCs GrO/Fe₃O₄ + CoFe₂O₄ have been investigated by X-ray diffraction method, scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, a vibrating sample magnetometer, and Mössbauer spectroscopy. With the help of Mössbauer investigations, the phase composition, magnetic state, and structure of synthesized MNCs GrO/Fe₃O₄ + CoFe₂O₄ have been established, which is important for creating high-performance materials for various applications. The heterogeneity of the MNCs obtained opens prospects for their biomedical applications.

中文翻译：

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用于磁热疗的磁性纳米复合材料氧化石墨烯/磁铁矿 + 钴铁氧体 (GrO/Fe3O4 + CoFe2O4)

摘要

在这项研究中，我们研究了通过机械化学方法（机械研磨过程）合成的各种浓度的新型磁性纳米复合材料 (MNCs) 氧化石墨烯 (GrO)/磁铁矿 (Fe ₃ O ₄ ) + 铁氧体钴 (CoFe ₂ O ₄ )在氧化石墨烯和初步合成的磁铁矿和铁氧体钴粉的水介质中的球磨机中。我们已经获得并研究了通过研磨获得的MNCs GrO/Fe ₃ O ₄ + CoFe ₂ O ₄具有各种成分含量（重量%），即：50/40 + 10；50/25 + 25；50/10 + 40；和 50/0 + 50. 合成的 MNCs GrO/Fe ₃ O ₄+ CoFe ₂ O ₄已通过 X 射线衍射法、扫描电子显微镜、透射电子显微镜、拉曼光谱、振动样品磁强计和穆斯堡尔光谱进行了研究。在穆斯堡尔研究的帮助下，合成的 MNCs GrO/Fe ₃ O ₄ + CoFe ₂ O ₄的相组成、磁态和结构已经确定，这对于为各种应用创造高性能材料非常重要。获得的跨国公司的异质性为其生物医学应用开辟了前景。