Abstract
Metal-organic framework-derived composites have been widely used in electromagnetic wave(EMW)ab-sorption,but the traditional synthetic strategy greatly limits the structure and species of MOFs.This re-search 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.
基金项目
This work was financially supported by the National Nat-ural Science Foundation of China(51407134)
Natural Sci-ence Foundation of Shandong Province(ZR2019YQ24)
Tais-han Scholars and Young Experts Program of Shandong Province(tsqn202103057)
China Postdoctoral Science Foundation(2016M590619)
NETL
NSTL
维普
万方数据