A generalizable strategy for constructing ultralight three-dimensional hierarchical network heterostructure as high-efficient microwave absorber

Chen Li; Zihan Li; Xiaosi Qi; Xiu Gong; Yanli Chen; Qiong Peng; Chaoyong Deng; Tao Jing; Wei Zhong

doi:10.1016/j.jcis.2021.07.054

A generalizable strategy for constructing ultralight three-dimensional hierarchical network heterostructure as high-efficient microwave absorber

J Colloid Interface Sci. 2022 Jan:605:13-22. doi: 10.1016/j.jcis.2021.07.054. Epub 2021 Jul 16.

Authors

Chen Li¹, Zihan Li¹, Xiaosi Qi², Xiu Gong¹, Yanli Chen¹, Qiong Peng¹, Chaoyong Deng³, Tao Jing⁴, Wei Zhong⁵

Affiliations

¹ College of Physics, Guizhou Province Key Laboratory for Photoelectrics Technology and Application, Guizhou University, Guiyang City 550025, People's Republic of China.
² College of Physics, Guizhou Province Key Laboratory for Photoelectrics Technology and Application, Guizhou University, Guiyang City 550025, People's Republic of China; Key Laboratory of Electronic Composites of Guizhou Province, Guizhou University, Guiyang City 550025, People's Republic of China; College of Science, Kaili University, Kaili 556011, People's Republic of China. Electronic address: xsqi@gzu.edu.cn.
³ Key Laboratory of Electronic Composites of Guizhou Province, Guizhou University, Guiyang City 550025, People's Republic of China.
⁴ College of Science, Kaili University, Kaili 556011, People's Republic of China.
⁵ National Laboratory of Solid State Microstructures and Jiangsu Provincial Laboratory for NanoTechnology, Nanjing University, Nanjing 210093, People's Republic of China. Electronic address: wzhong@nju.edu.cn.

PMID: 34303922
DOI: 10.1016/j.jcis.2021.07.054

Abstract

Using previous models and theories to construct and develop high-efficient microwave absorbers (MAs) should be a strategic and effective ways to optimize the electromagnetic wave attenuation. Herein, the ultralow density and flexible graphene oxide foam (GOF) and reduced graphene oxide foam (RGOF)/MoS₂ nanosheets were designed and fabricated by the method of chemical vapor deposition and hydrothermal reaction. The obtained GOF and RGOF/MoS₂ samples exhibited very excellent microwave absorption properties while their densities were merely 0.0082 and 0.0084 g•cm^-3, respectively. More importantly, benefiting from the excellent synergistic effect between RGOF and MoS₂, the designed RGOF/MoS₂ well inherited the combined advantages of GOF and MoS₂ in terms of strong absorption abilities, broad absorption bandwidth and thin matching thicknesses. The values of minimum reflection loss and effective frequency bandwidth for RGOF/MoS₂ sample could reach up to -62.92 dB with the matching thickness of 2.27 mm and 4.48 GHz with the matching thickness of 2.12 mm, which were very desirable for high-performance MAs. Moreover, the obtained results indicated that the microwave absorption properties of RGOF/MoS₂ sample could be further optimized by regulating the MoS₂ content. Therefore, a new and effective strategy was proposed to develop high efficiency MAs with ultra-lightweight, wide-band, thin thickness and strong absorption capabilities.

Keywords: Broad frequency bandwidth; Reduced graphene oxide foam/MoS(2) nanosheets; Strong absorption capability; Thin matching thicknesses; Three-dimensional interconnected network.