J. Mater. Sci. Technol. ›› 2025, Vol. 224: 56-65.DOI: 10.1016/j.jmst.2024.11.012

• Research Article • Previous Articles     Next Articles

Metal- nitrilotriacetic acid chelate derived strategy to selectively produce porous Ni/C, CoNi/C and Co/C magnetic heterostructured nanorods for lightweight and strong microwave absorption

Li Yaoa, Beibei Zhana, Xiaosi Qia,*, Xiu Gonga, Lei Wangb, Jing Xua,*, Junfei Dinga, Yunpeng Qua, Wei Zhongc   

  1. aCollege of Physics, Guizhou Province Key Laboratory for Photoelectrics Technology and Application, Guizhou University, Guiyang 550025, China;
    bNational Demonstration Center for Experimental Materials Science and Engineering Education, Jiangsu University of Science and Technology, Zhenjiang 212003, China;
    cNational Laboratory of Solid State Microstructures and Jiangsu Provincial Laboratory for NanoTechnology, Nanjing University, Nanjing 210093, China
  • Received:2024-11-05 Revised:2024-11-22 Accepted:2024-11-23 Published:2025-07-20 Online:2024-12-03
  • Contact: *E-mail addresses: xsqi@gzu.edu.cn (X. Qi), jxu7@gzu.edu.cn (J. Xu)

Abstract: Because of tempting magnetic-dielectric synergies and interfacial effects, designing a simple and low-cost route for producing multidimensional carbon-based magnetic nanocomposites is very important for the development of microwave absorbers (MAs). In this paper, a facile and propagable Ni-nitrilotriacetic acid chelate (NAC) derived strategy was proposed to selectively fabricate zero-dimensional (0D)/one-dimensional (1D) porous Ni/C magnetic heterostructured nanorods (MHNRs) consisting of 1D carbon nanorod, lots of pores and 0D Ni nanoparticles via a combined hydrothermal and thermally treated methods. The porous Ni/C MHNRs displayed the progressively improved Ni and C crystallinity by controlling the temperature, which resulted in the tunable electromagnetic and microwave absorption properties (MAPs). Additionally, 0D/1D porous CoNi/C and Co/C MHNRs could be selectively produced through this strategy by adopting CoNi-NAC and Co-NAC as precursors. Benefiting from desirable interface and magnetic/dielectric synergies, the acquired 0D/1D porous Ni/C, CoNi/C and Co/C MHNRs presented excellent MAPs and certain corrosion resistance properties. In especial, Co/C MHNRs displayed a strong absorption capacity (-47.89 dB), an ultrawide effective absorption bandwidth (8.40 GHz) and small matching thicknesses (∼2 mm), which were a desirable candidate for MAs. Consequently, a facile, low-cost and propagable metal-NAC derived strategy was proposed to synthesize 0D/1D porous carbon-based MHNRs, which presented an alternative technique to develop lightweight efficient MAs.

Key words: Metal-nitrilotriacetic acid chelate derived strategy, Magnetic heterostructured nanorod, Ni/C, CoNi/C and Co/C porous nanorod, Magnetic/dielectric synergistic effect, Microwave absorption