MOF-derived ZrO2/C nanocomposite for efficient electromagnetic wave absorption
Carbon-based materials derived from metal-organic frameworks (MOFs) have drawn increasing research attention for high-performance electromagnetic wave absorption due to the unique microstructure. In this work, MOF-derived ZrO2/C octahedrons have been successfully synthesized from UIO-66. The ZrO2 nanoparticles (4−6 nm) were evenly distributed inside the octahedral carbon matrix with an average edge length of 500 nm. Benefiting from the suitable carbonization treatment, which leads to a strong attenuation capacity and a harmonious impedance matching characteristic, superb electromagnetic wave absorption performances with minimum reflection loss (RL) value of −58.7 dB (16.8 GHz, 1.5 mm) have been achieved. And the effective absorption bandwidth (EAB; RL<−10 dB) could cover 91.3% (3.4−18.0 GHz) of the measured frequency within the thickness of 1.0−5.0 mm. Thus, the MOF-derived ZrO2/C nanocomposites with light weight, thin thickness, high stability, strong absorption intensity and ultra-wide absorption bandwidth exhibit a huge application potential as high-performance electromagnetic wave absorption materials.