Heterogeneous iron-nickel compound/RGO composites with tunable microwave absorption frequency and ultralow filler loading

Miaomiao Zhang; Zhiyang Jiang; Haoxu Si; Xuefeng Zhang; Caixia Liu; Chunhong Gong; Yahong Zhang; Jingwei Zhang

doi:10.1039/d0cp00290a

Heterogeneous iron-nickel compound/RGO composites with tunable microwave absorption frequency and ultralow filler loading

Phys Chem Chem Phys. 2020 Apr 29;22(16):8639-8646. doi: 10.1039/d0cp00290a.

Authors

Miaomiao Zhang¹, Zhiyang Jiang¹, Haoxu Si¹, Xuefeng Zhang², Caixia Liu¹, Chunhong Gong¹, Yahong Zhang¹, Jingwei Zhang³

Affiliations

¹ Institute of Functional Polymer Composites, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China. gong@henu.edu.cn and National & Local Joint Engineering Research Center for Applied Technology of Hybrid Nanomaterials, Henan University, Kaifeng 475004, China.
² Innovative Center for Advanced Materials, Hangzhou Dianzi University, Hangzhou 310012, China.
³ National & Local Joint Engineering Research Center for Applied Technology of Hybrid Nanomaterials, Henan University, Kaifeng 475004, China.

PMID: 32270156
DOI: 10.1039/d0cp00290a

Abstract

We fabricated heterogeneous iron-nickel compound/reduced graphene oxide (RGO) composites to obtain lightweight and high-efficiency microwave absorption materials with tunable absorption frequency. Using a facile hydrothermal route in combination with calcination at varying temperatures of 500-700 °C, the magnetic components Fe0.64Ni0.36, Fe0.64Ni0.36@Fe2Ni2N, and Fe2Ni2N were obtained. Due to strong interfacial polarization and dipole polarization as well as the conductive network formed by the substantial number of interfaces, all the magnetic RGO hybrids presented remarkable electromagnetic wave attenuation ability even when the filler content was only 5.2 wt%. More importantly, the optimization of reflection loss and tunable absorption frequency could be successfully realized by tuning the hybrid architecture and electromagnetic properties. This work reveals the mechanism of polarization-related dielectric relaxation of RGO, which provides new opportunities for designing lightweight and highly efficient microwave-absorbing materials by fully utilizing the hetero-interfacial effects.