J. Mater. Sci. Technol. ›› 2022, Vol. 128: 59-70.DOI: 10.1016/j.jmst.2022.04.017

• Research Article • Previous Articles     Next Articles

Microstructure optimization of core@shell structured MSe2/FeSe2@MoSe2 (M = Co, Ni) flower-like multicomponent nanocomposites towards high-efficiency microwave absorption

Zhang Jingjinga, Qi Xiaosia,b,*(), Gong Xiua, Peng Qionga, Chen Yanlia, Xie Rena, Zhong Weib,*()   

  1. aCollege of Physics, Guizhou Province Key Laboratory for Photoelectrics Technology and Application, Guizhou University, Guiyang 550025, China
    bNational Laboratory of Solid State Microstructures and Jiangsu Provincial Laboratory for NanoTechnology, Nanjing University, Nanjing 210093, China
  • Received:2022-04-05 Revised:2022-04-19 Accepted:2022-04-24 Published:2022-11-20 Online:2022-11-22
  • Contact: Qi Xiaosi,Zhong Wei
  • About author:wzhong@nju.edu.cn (W. Zhong).
    *College of Physics, Guizhou Province Key Laboratory for Photoelectrics Technology and Application, Guizhou University, Guiyang 550025, China. E-mail addresses: xsqi@gzu.edu.cn (X. Qi),

Abstract:

In this work, we put forward a scheme to exquisitely design and selectively synthesize the core@shell structured MSe2/FeSe2@MoSe2 (M = Co, Ni) flower-like multicomponent nanocomposites (MCNCs) through a simple two-step hydrothermal reaction on the surfaces of MFe2O4 nanospheres with the certain amounts of Mo and Se sources. With increasing the amounts of Mo and Se sources, the obtained core@shell structured MSe2/FeSe2@MoSe2 (M = Co, Ni) MCNCs with the enhanced content of MoSe2 and improved flower-like geometry morphology could be produced on a large scale. The obtained results revealed that the as-prepared samples displayed improved comprehensive microwave absorption properties (CMAPs) with the increased amounts of Mo and Se sources. The as-prepared CoSe2/FeSe2@MoSe2 and NiSe2/FeSe2@MoSe2 MCNCs with the well-defined flower-like morphology could simultaneously present the outstanding CMAPs in terms of strong absorption capability, wide absorption bandwidth, and thin matching thicknesses, which mainly originated from the conduction loss and flower-like geometry morphology. Therefore, the findings not only develop the very desirable candidates for high-performance microwave absorption materials but also pave a new way for optimizing the CMAPs through tailoring morphology engineering.

Key words: Core@shell structure, MSe2/FeSe2@MoSe2 (M=Co, Ni), multicomponent nanocomposites, Flower-like geometry morphology, Broad frequency bandwidth, Microwave absorption