NiFe₂O₄, NiFe₂O₄/MWCNTs, CoFe₂O₄ and CoFe₂O₄/MWCNTs nanocomposites were synthesized via the hydrothermal method. XRD, FT-IR, SEM and TEM techniques have been used to investigate the structural properties. CoFe₂O₄/MWCNTs has a good morphology with small sizes compared to NiFe₂O₄/MWCNTs. UV–vis. DRS analysis showed that the nanocomposites have high absorbance of irradiation in the whole range of the wavelengths (200–900 nm). The optical energy gaps of the nanocomposites have been calculated. Using VSM technique, NiFe₂O₄ and NiFe₂O₄/MWCNTs exhibited super-paramagnetism at room temperature, while CoFe₂O₄ and CoFe₂O₄/MWCNTs exhibited ferromagnetism with saturation magnetization of 37.8, 25.5, 66.46 and 51.49 emu/g, respectively. The AC conductivity measurements for NiFe₂O₄ and CoFe₂O₄ NPs revealed an increase in conductivity with the addition of MWCNTs as well as the dielectric measurements. The structural and electrical properties of CoFe₂O₄/MWCNTs make it of potential for capacitive storage and optoelectronic devices. Promising magnetic-optical properties can be utilized for developing recyclable photocatalytic applications.

通过水热法合成了NiFe ₂ O ₄，NiFe ₂ O ₄ / MWCNTs，CoFe ₂ O ₄和CoFe ₂ O ₄ / MWCNTs纳米复合材料。XRD，FT-IR，SEM和TEM技术已被用于研究结构性能。与NiFe ₂ O ₄ / MWCNTs相比，CoFe ₂ O ₄ / MWCNTs具有良好的形貌，且尺寸较小。紫外可见 DRS分析表明，纳米复合材料在整个波长范围内（200-900 nm）都具有很高的辐射吸收率。已经计算出纳米复合材料的光能隙。使用VSM技术，NiFe ₂O ₄和NiFe ₂ O ₄ / MWCNTs在室温下表现出超顺磁性，而CoFe ₂ O ₄和CoFe ₂ O ₄ / MWCNTs表现出铁磁性，饱和磁化强度分别为37.8、25.5、66.46和51.49 emu / g。NiFe ₂ O ₄和CoFe ₂ O ₄ NP的AC电导率测量结果表明，随着MWCNT的添加以及电介质测量值的增加，电导率有所提高。CoFe ₂ O ₄的结构和电性能/ MWCNT使它在电容性存储和光电设备中具有潜力。有希望的磁光特性可用于开发可回收的光催化应用。