J. Mater. Sci. Technol. ›› 2022, Vol. 108: 236-243.DOI: 10.1016/j.jmst.2021.07.049

• Invited Review • Previous Articles     Next Articles

Metal-organic framework-derived CoSn/NC nanocubes as absorbers for electromagnetic wave attenuation

Chenxi Wanga, Zirui Jiaa,b,c,*(), Shuangqiao Hea, Jixi Zhoua, Shuo Zhanga, Mengli Tiana, Bingbing Wanga, Guanglei Wua,*()   

  1. aInstitute of Materials for Energy and Environment, State Key Laboratory of Bio-fibers and Eco-textiles, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China
    bCollege of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China
    cWeihai Innovation Institute, Qingdao University, Weihai 264200, China
  • Received:2021-06-15 Revised:2021-07-21 Accepted:2021-07-25 Published:2021-10-28 Online:2021-10-28
  • Contact: Zirui Jia,Guanglei Wu
  • About author:wuguanglei@mail.xjtu.edu.cn (G. Wu).
    * E-mail addresses: jiazirui@qdu.edu.cn (Z. Jia),
    First author contact:

    1 These authors contributed equally to this work.

Abstract:

Metal-organic framework-derived composites have been widely used in electromagnetic wave (EMW) absorption, but the traditional synthetic strategy greatly limits the structure and species of MOFs. This research provided a solvent-free method to synthesize Co-MOF and its derivatives. Using CoSnO3 as the precursor, the preparation of Co-MOF is achieved by bridging the cobalt (II) ion of CoSnO3 and the 2-methylimidazole skeleton. The CoSn/N-doped carbon (CoSn/NC) composites derived from CoSnO3-MOF (Co-MOF with CoSnO3 as Co source) retain the original morphology of CoSnO3. Besides, the polarization effect produced by the N-doped carbon layers also benefits the excellent EMW absorption performance of the CoSn/NC composites. It is reflected in the minimum reflection loss (RL) of -48.2 dB at 2.2 mm and the effective bandwidth (EBA) of 5.84 GHz. This work provides a new channel to the construction of Co-MOFs, which could be extended to other Co-based oxides and vastly expand the species of MOFs based on metallic Co.

Key words: Hollow nanocubes structure, N-doped carbon, CoSnO3-MOF, Electromagnetic wave absorption