Facile preparation of octahedral Fe3O4/RGO composites and its microwave electromagnetic properties

• Published in: Journal of materials science. Materials in electronics 2016-09, Vol.27 (9), p.9577-9583
• Main Authors: Huang, Yumin, Qi, Qing, Pan, Hai, Lei, Xuefeng, Liu, Xiaobo
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Materials Science; Optical and Electronic Materials
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-016-5011-6

The novel octahedral Fe 3 O 4 /RGO composites with sandwich-like structures were synthesized through ultrasonic and thermal reduction process. The octahedral Fe 3 O 4 nanoparticles were incorporated into the RGO by coordination bonding, which was confirmed by Fourier-transform infrared spectroscopy and scanning electron microscopy. Compared with octahedral Fe 3 O 4 , the obtained composites exhibited an obviously enhanced microwave absorption property which were attributed to the complementarities between the dielectric loss and the magnetic loss. For the octahedral Fe 3 O 4 /RGO composites, a wide absorption band less than −10 dB was in the range of 3–18 GHz. Moreover, the bandwidth of R L exceeded −20 dB (99 % absorption) over 5 GHz (12–16 and 17–18 GHz). In addition, the maximum R L was up to −65 dB at a thickness of 1.8 mm. All the results suggested that it provided a facile method to fabricate novel electromagnetic wave-absorption materials.