Nowadays, designing and fabricating electromagnetic (EM) wave absorbers with lightweight and strong reflection loss (RL) is still urgent. Herein, rGO/CoFe₂O₄ composite combined with magnetic CoFe₂O₄ nanorods and reduced graphene oxide (rGO) was fabricated via molten salt method in combination with a simple etching route. The EM absorption ability of rGO/CoFe₂O₄ nanorods composite can be regulated by changing the rGO addition amount. Particularly, the absorber for rGO/CoFe₂O₄ nanorods composite with the rGO addition amount of 70 mg (S-70) displays favorable EM wave absorption properties. The optimal RL value is − 56.3 dB at the frequency of 16.9 GHz, when the corresponding thickness is 1.4 mm. The effective absorption bandwidth (EAB, RL < − 10 dB) is 4.3 GHz, when the thickness is 1.6 mm. Consequently, the rGO/CoFe₂O₄ nanorods composite is a potential candidate for microwave absorbing materials.

如今，设计和制造具有轻量级且反射损耗（RL）强的电磁（EM）吸收器仍然迫在眉睫。在此，结合熔融的CoO ₂ O ₄磁性纳米棒和氧化石墨烯（rGO），结合简单的蚀刻工艺，制备了rGO / CoFe ₂ O ₄复合材料。可以通过改变rGO的添加量来调节rGO / CoFe ₂ O ₄纳米棒复合材料的EM吸收能力。特别是用于rGO / CoFe ₂ O ₄的吸收剂rGO添加量为70 mg（S-70）的纳米棒复合材料显示出良好的EM波吸收特性。当相应的厚度为1.4 mm时，最佳RL值在16.9 GHz频率下为− 56.3 dB。当厚度为1.6 mm时，有效吸收带宽（EAB，RL <− 10 dB）为4.3 GHz。因此，rGO / CoFe ₂ O ₄纳米棒复合材料是微波吸收材料的潜在候选者。