| In recent years,electromagnetic waves have been widely used in many fields such as military,communications,medical treatment,and detection,which have brought a lot of convenience to production and life.However,the wide application of electromagnetic waves has also caused a lot of pollution in electromagnetic space.The use of electromagnetic wave absorbing materials is an effective method to control electromagnetic wave pollution.Therefore,it is of great significance to develop high-performance electromagnetic wave absorbing materials.In addition,the electromagnetic wave absorption material of a specific waveband is also very helpful for military equipment to achieve radar stealth.In recent years,graphene and graphene-based composite materials have been widely concerned in the field of electromagnetic wave absorption research.It is significant to fabricate the oxide nanoparticle/graphene composite for improving the electromagnetic wave absorption properties.In this paper,the monodisperse manganese oxide(MnO)nanoparticle/reduced graphene oxide(rGO)composite was obtained by in situ growing MnO on the surface of rGO via the hydrophobic interaction in the collidal solution.The monodisperse MnO nanoparticles grown on the surface of rGO is about 55 nm with a uniform distribution due to the modification of oleylamine.When it was used for the electromagnetic wave absorption,an excellent electromagnetic wave absorption in the 2-18 GHz band was displayed.Its effective EM absorption bandwidth can be up to 4.6 GHz at 1.54 mm thickness,and the minimum reflection loss can be up to-49.28 dB at 2.3 mm thickness.This is because the monodisperse MnO nanoparticles with the uniform distribution could provide more interfacial polarization active sites,which enhance the interfacial polarization effect without density raise.This uniform hybrid is expected to be a potential candidate for the outstanding electromagnetic wave absorption performance. |
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