Structural characterization and microwave absorbing performance of CuFe2O4/RGO composites

• Published in: Journal of solid state chemistry 2021-05, Vol.297, p.122051, Article 122051
• Main Authors: Ding, Guoxin, Chen, Chuanxin, Tai, Hongxu, Tang, Zhongfeng, Wang, Zhoufeng, Cheng, Guojun, Wan, Xianglong
• Format: Article
• Language: English
• Subjects: Composites; Copper ferrite; Microwave absorption; Reduced graphene oxide
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1016/j.jssc.2021.122051

Efficient preparation of microwave absorbers with thin thickness, strong absorbance, broad bandwidth and low filler loading remains a significant challenge. In this study, copper ferrite/reduced graphene oxide composites were synthesized by a one-pot hydrothermal method. The chemical composition, phase structure and micromorphology were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscope, scanning electron microscope and transmission electron microscope. The characteristics of electromagnetic were assessed on a vector network analyzer. Results show that the content of graphene oxide greatly influences the microwave absorption properties of copper ferrite/reduced graphene oxide composites. The maximum reflection loss value of composites was −58.7 ​dB ​at 9.2 ​GHz with a thickness of 2.56 ​mm, when the primitive amount of graphene oxide was 20 ​mg. At the same time, the effective bandwidth can reach 5.2 ​GHz under merely 1.85 ​mm. The brilliant performance of microwave absorption is usually ascribed to multi-dipole polarization and outstanding impedance matching. This work supplies guidance for designing absorbers that are lightweight, wideband, and strong absorption ability. Fig. 9. Electromagnetic parameters (a), (b), (c) and (d); dielectric loss (e), magnetic loss (f). [Display omitted] •CuFe2O4/RGO composites were synthesized via a simple hydrothermal method.•The maximum reflection loss was -58.7 ​dB ​at 9.2 ​GHz with a thickness of 2.56 ​mm.•The effective absorption band was 5.2 ​GHz under merely 1.85 ​mm.•Good microwave absorption owe to multi-dipole polarization and impedance matching.