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Fe₃O₄ nanoparticles decorated on a CuS platelet-based sphere: a popcorn chicken-like heterostructure as an ideal material against electromagnetic pollution
- Sun, Xiaodong, Sui, Mingxu, Cui, Guangzhen, Li, Ling, Li, Xiaopeng, Lv, Xuliang, Wu, Fan, Gu, Guangxin
- RSC advances 2018 v.8 no.31 pp. 17489-17496
- absorption, energy, human health, iron oxides, irradiation, magnetism, microstructure, nanoparticles, pollution, popcorn, temperature
- Electromagnetic irradiation has caused environmental pollution and harmful effects on human health. The use of effective materials to attenuate electromagnetic energy is urgently required. In this study, Fe₃O₄ nanoparticles (NPs) decorated on a CuS platelet-based sphere (CuS/Fe₃O₄) with popcorn chicken-like micromorphology were synthesized through a solvothermal deposition method. The effects of reaction temperature and quantity of Fe₃O₄ NPs on the heterostructures, morphologies and electromagnetic absorption (EA) properties of the heterostructures were investigated. CuS/Fe₃O₄ heterostructures exhibited remarkable enhancement in comparison with pure Fe₃O₄ NPs and the CuS platelet-based sphere. With the contribution from dielectric and magnetic losses, a CuS/Fe₃O₄ heterostructure-loaded composite could achieve a minimum reflection loss (RL) of −61.32 dB at 14.00 GHz and an effective EA bandwidth (≤−10 dB) of 4.15 GHz at a thickness of only 1.5 mm simultaneously. The current study indicates that the CuS/Fe₃O₄ heterostructures can potentially be applied as advanced electromagnetic absorbers.