阶梯热还原法制备Fe3O4/rGO复合膜

先用溶液共混法获得Fe₃O₄纳米颗粒与氧化石墨烯（GO）混合溶液, 再通过阶梯热还原过程（从室温逐渐升至160 ℃）制备Fe₃O₄和还原氧化石墨烯（rGO）复合膜， 并用X射线衍射仪、 Fourier变换红外光谱和扫描电子显微镜表征不同Fe₃O₄质量分数的Fe₃O₄/rGO复合膜的结构和形貌, 用矢量网络分析仪测试复合膜的电磁参数. 实验结果表明, 当Fe₃O₄质量分数为40％时, 复合膜的吸波效能为17.30 dB, 频率为10.72 GHz, 厚度为2 mm, 低于-10 dBKG*8]的有效吸收带宽为3.28 GHz.

Fe3O4/rGO Composite Film Prepared byStep by Step Thermal Reduction Method

Firstly, a mixture solution of Fe₃O₄ nanoparticles and graphene oxide was prepared by solution blending method. Then, Fe₃O₄/rGO composite film was prepared by step by step thermal reduction method from room temperature up to 160 ℃. X-raydiffraction, Fourier transform infrared spectroscopy and scanning electron microscopy were used to characterize the structure and morphology of the films withdifferent mass fractions of Fe₃O₄. We used vector network analyzer to test electromagnetic parameters of the composite film. The results show that when the mass fraction of Fe₃O₄ is 40%, the absorbing wave performance of the composite film is 17.30 dB at frequency of 1072 GHz with a matching thickness of 2.0 mm, and the effective absorption bandwidth less than -10 dB is 3.28 GHz.