Abstract
Currently, electromagnetic pollution management has gained much attention due to the various harmful effects on wildlife and human beings. Electromagnetic absorbers can convert energy from electromagnetic waves into thermal energy. Previous reports have demonstrated that reduced graphene oxide (rGO) makes progress in the electromagnetic absorption (EA) field. But the high value of permittivity of rGO always mismatches the impedance which results in more electromagnetic wave reflection on the surface. In this work, sandwich-like rGO/CuS/polypyrrole (PPy) nanoarchitectures have been synthesized by a facile two-step method. The experimental result has shown that a paraffin composite containing 10 wt.% of rGO/CuS/PPy could achieve an enhanced EA performance both in bandwidth and intensity. The minimum reflection loss (RL) value of −49.11 dB can be reached. Furthermore, the effective bandwidth can cover 4.88 GHz. The result shows that the as-prepared rGO/CuS/PPy nanoarchitectures will be a promising EA material.
Highlights
The swift expansion of communication devices, such as mobile phone, wire-less internet as well as military equipment, have caused an increase in electromagnetic pollution [1,2,3,4,5,6]
It can be observed that a broad peak appeared near 26◦ and covered the characteristic peak of graphene (002) near 25◦ which indicated that the PPy in reduced graphene oxide (rGO)/CuS/PPy had an amorphous structure, and the scattering pair of protic interplanar molecular chains of PPy should have a diffraction peak in this range
In this paper, starting from the design of component regulation, CuS nanoparticles were first. In this starting from the design ofbycomponent nanoparticles were compounded onpaper, the surface of the rGO
Summary
The swift expansion of communication devices, such as mobile phone, wire-less internet as well as military equipment, have caused an increase in electromagnetic pollution [1,2,3,4,5,6]. Because of its harmful effects on the environment and organisms, it has become a serious danger for modern society. To solve this problem, electromagnetic absorbers have become indispensable. They are a kind of material that can provide an alternative to the attenuation of electromagnetic waves [7,8,9,10]. For practical applications, qualified electromagnetic absorbers should possess several characteristics such as wide absorption, strong electromagnetic absorption (EA) capability, high thermal stability, antioxidant capacity, and low weight [11,12,13,14,15].
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