One-Pot Hydrothermal Preparation of Fe₃O₄ Decorated Graphene for Microwave Absorption

• Main Authors: Zhonghe Du, Xibang Chen, Youwei Zhang, Xueyan Que, Pinggui Liu, Xiuqin Zhang, Hui-Ling Ma, Maolin Zhai
• Format: Article
• Language: English
• Published: MDPI AG 2020-07-01
• Series: Materials
• Subjects: microwave absorption; hydrothermal method; graphene; Fe₃O₄ nanoparticles; nanocomposites
• Online Access: https://www.mdpi.com/1996-1944/13/14/3065
• ISSN: 1996-1944

Fe₃O₄ decorated graphene was synthesized for electromagnetic wave absorption via a facile one-pot hydrothermal approach. The structure and morphology of the as-prepared nanomaterials were systematically investigated. The graphene oxide (GO) was reduced and Fe₃O₄ nanoparticles were evenly decorated on the surface of reduced graphene oxide (rGO) nanosheets. The average particle size of Fe₃O₄ nanoparticles is about 15.3 nm. The as-prepared rGO-Fe₃O₄ nanocomposites exhibited a good microwave absorption performance because of the combination of graphene and magnetic Fe₃O₄. When the thicknesses are 1.6 mm and 6.5 mm, the reflection loss (RL) values are up to −34.4 dB and −37.5 dB, respectively. The effective bandwidths are 3.8 and 1.9 GHz.