摘要
Exploring a simple,rapid,solvent-free synthetic method for mass production of cheap,broadband mi-crowave absorbers remains the main challenge.Here,a mild solvent-free procedure is reported to syn-thesize zinc oxide nanoparticles(ZnO NPs)embedded in porous carbon derived from mixing sucrose and zinc nitrate hexahydrate.The characteristic morphology and the ZnO NPs distribution in these compos-ites were tuned using the different raw materials proportions.The mesoporous structure of porous car-bon benefits the compositional advantages between carbon foam and ZnO NPs.The optimal synthesized ZnO/C-2 carbon material demonstrates the strongest absorption of-41.7 dB with a frequency of 14.5 GHz at a thin thickness of 2 mm,and its widest effective absorption is close to 6 GHz(12.2-17.8 GHz).This work produces a feasible route for the sensible design of other effective microwave absorbers for large-scale production.
基金
the State Key Lab of Advanced Technology for Materials Synthesis and Processing(Wuhan Univer-sity of Technology)for financial support.
