Bi₂S₃ and Fe₃O₄ nanostructures as well as Bi₂S₃@Fe₃O₄ nanocomposites were produced using hydrothermal synthesis. Scanning electron microscopy (SEM), energy dispersive spectra (EDS) and X-ray diffraction (XRD) were used in the characterization of the nanocomposites. The effect of heat treatment on chemical, physical and magnetic properties of the nanostructures was investigated in this study. It was determined that the duration of heat treatment affects the size and shape of the nanostructures. Bi₂S₃ samples produced using less than 12 h of heat treatment formed in nanoflower-like shapes whereas when the heat treatment was extended to 24 h, the samples formed in nanoribbon-like shapes. The study concludes that an increase in the duration of heat treatment enhances the saturation value of magnetization of Fe₃O₄ nanostructures. Bi₂S₃ nanostructures were doped with Fe₃O₄ nanostructures to produce Bi₂S₃@Fe₃O₄ nanocomposites which have significant magnetic properties. An increased duration of heat treatment increases the magnetic saturation values of Fe₃O₄ and Bi₂S₃@Fe₃O₄ nanostructures. Bi₂S₃, Fe₃O₄ and Bi₂S₃@Fe₃O₄ samples show X-ray imaging contrast enhancement properties.

中文翻译：

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医用Bi 2 S 3 @Fe 3 O 4纳米复合材料的结构和磁性研究

利用水热合成法制备了Bi ₂ S ₃和Fe ₃ O ₄纳米结构以及Bi ₂ S ₃ @Fe ₃ O ₄纳米复合材料。扫描电镜（SEM），能量色散谱（EDS）和X射线衍射（XRD）用于表征纳米复合材料。在这项研究中研究了热处理对纳米结构的化学，物理和磁性的影响。已确定热处理的持续时间影响纳米结构的尺寸和形状。Bi ₂ S ₃使用少于12小时的热处理生产的样品形成纳米花状，而当热处理延长至24小时时，样品形成纳米带状。研究得出结论，热处理持续时间的增加会增强Fe ₃ O ₄纳米结构的磁化饱和值。用Fe ₃ O ₄纳米结构掺杂Bi ₂ S ₃纳米结构以产生具有显着磁性的Bi ₂ S ₃ @Fe ₃ O ₄纳米复合材料。延长的热处理时间会增加Fe ₃ O的磁饱和值₄和Bi ₂ S ₃ @Fe ₃ O ₄纳米结构。Bi ₂ S ₃，Fe ₃ O ₄和Bi ₂ S ₃ @Fe ₃ O ₄样品显示出X射线成像对比度增强特性。