The development of MOF and biomass-derived functional materials has made outstanding contribution to the remediation of electromagnetic pollution; however, the deigned synthesis of microwave absorbers with synergistic transformation of MOF and biomass components still remains challenging. Herein, we report an in situ sulfuration strategy for the rational construction of Co_xS_y/Ni_xS_y and Ni NPs embedded in N-doped 3D porous carbons (N-Ni-Co_xS_y/Ni_xS_y@C) through controllable sol–gel assembly and carbonization processes employing ZIF-67 and CMC as raw materials. The results showed that defects induced by N doping and Ni NPs, Co_xS_y/Ni_xS_y encapsulation synergistically promoted the impedance matching in the composites. Consequently, when the filler content was 25%, the minimum reflection loss value at 11.7 GHz reached −48.3 dB and the effective absorption bandwidth beyond 3.95 GHz. By virtue of the easy-to-handle assembly process of ZIF-67 and CMC, this designed synthesis method might be potentially promising for up-scale preparation of excellent electromagnetic wave absorbers.

MOF和生物质衍生功能材料的开发为电磁污染的修复做出了突出贡献；然而，设计合成具有 MOF 和生物质组分协同转化的微波吸收剂仍然具有挑战性。在此，我们报告了一种原位硫化策略，用于合理构建嵌入 N 掺杂 3D 多孔碳 (N-Ni-Co _x S _y /Ni _x S _y @C)的 Co _x S _y /Ni _x S _y和 Ni NPs ) 通过可控的溶胶-凝胶组装和碳化过程，采用 ZIF-67 和 CMC 作为原材料。结果表明 N 掺杂和 Ni NPs、Co 引起的缺陷_x S _y /Ni _x S _y封装协同促进了复合材料中的阻抗匹配。因此，当填料含量为 25% 时，11.7 GHz 处的最小反射损耗值达到 -48.3 dB，有效吸收带宽超过 3.95 GHz。凭借 ZIF-67 和 CMC 易于处理的组装过程，这种设计的合成方法可能有望用于大规模制备优良的电磁波吸收剂。