Precursors of a nickel-based metal–organic framework, denoted Ni-MOF, and the loofah plant were prepared by the microwave method, and “tree blossom” Ni/Nitrogen doped Carbon (NC)/ Carbon (C) composites were prepared by in situ pyrolysis under an argon atmosphere. During pyrolysis, the morphology, specific surface area, porous structure and electromagnetic parameters of the Ni/NC/C composites were adjusted by adjusting the pyrolysis temperature. The maximum reflection loss of the corresponding Ni/NC/C composites can reach −63.1 dB at 13.84 GHz and a thickness of 2 mm when the pyrolysis temperature was 650 ℃ and the filling amount was 16 wt%. And the effective absorption bandwidth was 35.44 GHz when the thickness was adjusted from 1 mm to 5.5 mm within the range of 2–40 GHz. Excellent performance comes from conduction loss, dipole and interface polarization, magnetic resonance, multiple electromagnetic reflections and scattering, and equilibrium impedance matching.

用微波法制备了镍基金属有机骨架的前体，表示为 Ni-MOF 和丝瓜植物，并通过在氩气氛下的原位热解。在热解过程中，通过调节热解温度来调节Ni/NC/C复合材料的形貌、比表面积、多孔结构和电磁参数。当热解温度为 650 ℃、填充量为 16 wt% 时，相应的 Ni/NC/C 复合材料在 13.84 GHz 和 2 mm 厚度下的最大反射损耗可达 -63.1 dB。当厚度在 2-40 GHz 范围内从 1 mm 调整到 5.5 mm 时，有效吸收带宽为 35.44 GHz。卓越的性能来自传导损耗，