Hollow ZnO/ZnFe2O4 microspheres anchored graphene aerogels as a high-efficiency microwave absorber with thermal insulation and hydrophobic performances

Comparison of the microwave absorption performance of core–shell SiO2@C and hollow carbon nanospheres with different sizes

“…18,91 The oxygen-containing functional groups and defects formed in the carbon shells can work as polarization centers, which will cause polarization relaxation in the electromagnetic field. 92 Besides, the presence of C-Si bonds in SiO 2 @C/paraffin composites may cause dipolar relaxation between SiO 2 cores and carbon shells. Exactly as shown in Fig.…”

Design of two-dimensional organic–inorganic heterostructures for high-performance electromagnetic wave absorption

“…61 The large difference in dielectric constants, low thickness, and the large interfacial area between the two phases lead to a stronger interfacial polarization effect. [62][63][64][65] In 2D organic-inorganic heterostructures, extremely strong interfacial polarization arises due to the very different dielectric properties of the conducting polymer layer and the V 2 O 5 layer, and both are monomolecular layers. (4) The alternating arrangement of conducting polymer layers and V 2 O 5 layers forms many nanocapacitors, which facilitate the storage and attenuation of electromagnetic wave energy.…”

Fabrication of an Ultralight Ni-MOF-rGO Aerogel with Both Dielectric and Magnetic Performances for Enhanced Microwave Absorption: Microspheres with Hollow Structure Grow onto the GO Nanosheets

“…Communication technologies and electronic facilities have developed with high speed nowadays, which has caused electromagnetic radiation to become an increasingly serious problem. − Electromagnetic radiation not only has an influence on communication or electronic equipment but also can be harmful to human health. − Therefore, it is urgent to find a valid strategy to solve this problem. − Developing electromagnetic wave (EMW) absorption materials is a promising strategy to shield or alleviate electromagnetic radiation. − And the ideal EMW absorption materials need the merits of being lightweight and having thin matching thickness, strong absorption, and broad bandwidth. − To achieve this aim, researchers are committed to integrating these performances into one composite. − …”