Synthesis of NiCo-BNSA/RGO/MDCF with three-dimensional porous network structure as an excellent microwave absorber

Xiaowei Liu; Konghu Tian; Zhihong Chen; Chao Zhang; Jing Wang; Jinbo Zhu; Sheng Sun; Lixin Xu

doi:10.1016/j.jcis.2023.07.005

Synthesis of NiCo-BNSA/RGO/MDCF with three-dimensional porous network structure as an excellent microwave absorber

J Colloid Interface Sci. 2023 Nov 15;650(Pt A):396-406. doi: 10.1016/j.jcis.2023.07.005. Epub 2023 Jul 3.

Authors

Xiaowei Liu¹, Konghu Tian², Zhihong Chen¹, Chao Zhang³, Jing Wang⁴, Jinbo Zhu⁵, Sheng Sun⁶, Lixin Xu⁶

Affiliations

¹ School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China.
² School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China; Analysis and Test Center, Anhui University of Science and Technology, Huainan 232001, China; Pinghu Institute of Advanced Materials, Zhejiang University of Technology, Pinghu 314200, China. Electronic address: tkhsuper@163.com.
³ School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China. Electronic address: chaozhang@mail.bnu.edu.cn.
⁴ School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China; Pinghu Institute of Advanced Materials, Zhejiang University of Technology, Pinghu 314200, China.
⁵ School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China. Electronic address: pgb2@aust.edu.cn.
⁶ Pinghu Institute of Advanced Materials, Zhejiang University of Technology, Pinghu 314200, China.

PMID: 37418890
DOI: 10.1016/j.jcis.2023.07.005

Abstract

Melamine-derived carbon foam (MDCF) and nickel-cobalt bimetallic nanosheet arrays (NiCo-BNSA) possess unique porous structures and excellent microwave absorption (MA) properties, making them potentially useful in MA applications. In this investigation, we fabricated NiCo-BNSA/reduced graphene oxide/MDCF (NiCo-BNSA/RGO/MDCF) composites utilizing a two-stage synthesis protocol. This process incorporated melamine foam (MF) pretreatment, carbonization, and a subsequent in-situ growth stage, resulting in the creation of a three-dimensional porous network structure. By adjusting the RGO volume, we were able to manipulate the structure and composition of the NiCo-BNSA/RGO/MDCF composites, leading to an enhancement in their MA performance. It was also observed that the NiCo-BNSA was evenly distributed on the surface of both the RGO and MDCF. The composites exhibited an optimal reflection loss (RL_min) of -67.8 dB at a thickness of 2.50 mm, and by varying their thickness, the effective absorption bandwidth (EAB, RL ≤ -10 dB) extended to 9.80 GHz, encompassing the entire C and X bands. This study presents a novel approach for fabricating lightweight and efficient carbon-based MA composites.

Keywords: Melamine-derived carbon foams; Microwave absorption; NiCo alloys; Porous network structure; Reduced graphene oxide.