Synthesis and microwave absorption properties of sandwich-type CNTs/Fe3O4/RGO composite with Fe3O4 as a bridge

• DOI: 10.1007/s10854-017-7378-4
• Publication Date: 2017-06-24T03:12:39Z
• Authors: Qing Qi; Yumin Huang; Mingzhen Xu; Xuefeng Lei; Xiaobo Liu
• Keywords: 02 engineering and technology; 0210 nano-technology

A novel sandwich-type CNTs/Fe3O4/RGO composite with Fe3O4 as a bridge was successfully prepared through a simple solvent-thermal and ultrasonic method. The structure and morphology of the composite have been characterized by Fourier-transform infrared spectroscopy, X-ray diffraction and scanning electron microscopy. This new structure can effectively prevent the agglomeration of GO and the combination of CNTs/Fe3O4 and RGO shows a strong reflection loss (RL) (−50 dB) at 8.7 GHz with absorber thickness of 2.5 mm. Moreover, compared with CNTs/Fe3O4/GO composite, it is found that the thermal treating process is beneficial to enhance the microwave absorption properties, which may be attributed to high conductivity of RGO. On this basis, the microwave absorbing mechanism is systematically discussed. All the data show that the CNTs/Fe3O4/RGO composite exhibits excellent microwave absorption properties with light density and is expected to have potential applications in microwave absorption.