Hollow Metal–Organic Framework/MXene/Nanocellulose Composite Films for Giga/Terahertz Electromagnetic Shielding and Photothermal Conversion

Highlights The composite films are composed of hollow metal–organic frameworks/layered MXene/nanocellulose with unique alternating electromagnetic structures. The optimized composite films exhibit excellent EMI shielding performance of 66.8 dB at GHz frequency and 114.6 dB at THz frequency. The EMI shielding ability of composite films to electromagnetic waves is verified by practical visualized application simulation. The composite films show remarkable photothermal conversion performance, which can reach 235.4 °C under 0.8 W cm−2.