▎ 摘　　要

The ever-intensifying electromagnetic (EM) pollution drives the intense demand for EM shielding materials. Through evaporative self-assembly and hydrazine hydrate vapor reduction strategy, intricate multiwalled carbon nanotube (MWCNT) ingeniously anchors on the porous reduced graphene oxide (RGO) paper. The synthesized MWCNT-RGO composite paper manifests a better EMI shielding performance compared with pure RGO. Typically, S5-15 (5 wt% MWCNT, 15 g mixture) furnishes the maximum electromagnetic shielding effectiveness up to 47.88 dB with a thickness of 1.04 mm in the X band. These ingenious bicomponent microstructures possess abundant heterointerfaces and defects. Consequently, they synergistically balance the impedance matching, and contribute to conduction loss, polarization relaxation and multiple reflection and scattering. This work supplies the inspiration for the facile preparation of carbon composite with high EM shielding efficiency and thin lamellation by consolidating MWCNT and RGO to form porous heterostructure.