MXene has been considered an advanced electromagnetic interference (EMI) material nowadays. However, the dense MXene films result in reflection-dominated electromagnetic shielding properties. The conjugation of magnetic metal–organic frameworks (MOFs) and conductive MXene is an attractive strategy for constructing absorption-dominated EMI shielding materials. Herein, we demonstrate the carbonized zeolitic imidazolate frameworks/MXene/nanocellulose (CZMN) paper prepared by a two-step vacuum-assisted filtration (TVAF) method, which leads to the formation of bilayer structure (Lower layer as highly magnetic adsorption layer and upper layer as highly conductive reflection layer). The CZMN paper shows excellent conductivity (∼29800 S·m⁻¹), good magnetism (13 emu·g⁻¹), and high EMI shielding effectiveness (SE) up to 62.4 dB at 8.2 GHz with absorption-dominated EMI shielding (SE_A/SE_T up to 75%). More importantly, the effect of bilayer structure on the absorption and reflection of the electromagnetic waves are proved by experimental results. In addition, the total electromagnetic shielding performance of the prepared bilayer CZMN paper can be improved with the increase of the conductive layer content. At the same time, the absorption ratio can remain relatively stable. These features make the prepared bilayer CZMN paper a promising candidate for advanced equipment electromagnetic protection, military technology, and stealth materials.

如今，MXene 被认为是一种先进的电磁干扰 (EMI) 材料。然而，致密的 MXene 薄膜导致以反射为主的电磁屏蔽特性。磁性金属有机框架 (MOF) 和导电 MXene 的结合是构建吸收主导的 EMI 屏蔽材料的一种有吸引力的策略。在此，我们展示了通过两步真空辅助过滤（TVAF）方法制备的碳化沸石咪唑酯骨架/MXene/纳米纤维素（CZMN）纸，导致双层结构的形成（下层作为高磁性吸附层，上层层作为高导电反射层）。CZMN纸表现出优异的导电性（~29800 S·m ^-1）、良好的磁性（13 emu·g ^-1)，以及在 8.2 GHz 时高达 62.4 dB 的高 EMI 屏蔽效能 (SE)，具有以吸收为主的 EMI 屏蔽（SE _A /SE _T高达 75%）。更重要的是，实验结果证明了双层结构对电磁波吸收和反射的影响。此外，所制备的双层CZMN纸的总电磁屏蔽性能可以随着导电层含量的增加而提高。同时，吸收率可以保持相对稳定。这些特性使得制备的双层 CZMN 纸成为先进设备电磁防护、军事技术和隐形材料的有前途的候选者。